The latter appea… They are the elements that are often listed below the main section of the periodic table. The inner transition elements of this period are called Actinides, as they follow 89 The actinides are also shown at the bottom of the periodic table of elements under the Lanthanides. They are characterized by the filling up of the 4f The f block, as shown in the figure below, are the two rows in yellow. Uses of Lanthanides . The lanthanides and actinides are often called inner transition metals. All these three elements contain a ‘d’ electron in their electronic configuration. Like the lanthanides, the actinides form a family of elements with similar properties.Within the actinides, there are two overlapping groups: transuranium elements, which follow uranium in the periodic table—and transplutonium elements, which follow plutonium.Compared to the lanthanides, which (except for promethium) are found in nature in appreciable quantities, most actinides are rare. All Lanthanoids and Actinoids are metals. What period(s) do the Lanthanides and Actinides belong to? The basic metals are similar to transition metals but tend to be softer and to hint at nonmetallic properties. Why did the Vikings settle in Newfoundland and nowhere else? The can also be used for structural-alloy-modifying components of reactors. These elements are grouped together and called the lanthanides. When did organ music become associated with baseball? The Lanthanide and Actinide series are at the bottom of the periodic table of elements because if they were where they were supposed to be, then the table would be way too long. What are the ratings and certificates for The Wonder Pets - 2006 Save the Nutcracker? The The Lanthanide and Actinide series are at the bottom of the When did Elizabeth Berkley get a gap between her front teeth? They are classified as f block elements along with the actinides. �'����&��ȵ���� Lanthanides involve the filling of 4f−orbitals while actinides involve the filling of 5f−orbitals in their atoms. Asked on January 17, 2020 by Bipin Jariwala. They are the elements which are sometimes listed below the periodic table’s main section. Actinides. These 14, along with the actinidesatomic numbers 90 through 103are set aside from the periodic table due to similarities in properties that define each group. They are the elements that are often listed below the main section of the periodic table. an element with electrons filling in the d-orbital. ACTINIDES CONCEPT. THE CHEMISTRY OF LANTHANIDES INTRODUCTION Lanthanides(also called lanthanoids) are called first inner transition series or third transition and come immediately after lanthanum. Copyright © 2020 Multiply Media, LLC. What are the Lanthanide and Actinide series called. All Rights Reserved. They are commonly called the rare earths. It is because they have their outermost electrons in f orbitals. The seven orbitals of the f sublevel accommodate 14 electrons, so the f block is 14 elements in length. The third row of the 3B group contains all of ​the elements between element 57 (lanthanum) and element 71 (lutetium). The actinides are all radioactive and are therefore unstable. rare-earth metals of the lanthanides as well as yttrium, and scandium; however, some transition metals and actinides can also display this effect[2]. Place the lanthanides and actinides in the periodic table. Lesson Objectives . They are called lanthanides because the elements in the series are chemically similar to ... monazite and many others which can also contain the other two group 3 elements as well as thorium and occasionally other actinides as well. B. d-block element. C. f-block element. lanthanides and actinides. Define the lanthanides and actinides. silver, silvery-white, grey, many are radioactive; also called Inner Transition Metals and Rare Earth Metals. Specifically, the lanthanides and actinides are the only elements that fill the f-orbitals. Answer. The actinides (sometimes called actinoids) occupy the "bottom line" of the periodic table — a row of elements normally separated from the others, placed at the foot of the chart along with the lanthanides. %��������� �B����h`�1k>u>S2�]�P�˲8�Hʽ;'�dJ���y!P`- )iH��E{�� �Ppu�p �>VŃy� It is pulled out of the main body of the period table and is shown at the very bottom. There are three Lanthanide metals: cerium,Ce,lutetium, Lu and gadolinium, Gd, that have properties similar to the ‘d’ block/ transition metals. Due to their scarcity, the inner transition elements are also called rare earth elements. The lanthanide series includes elements 58 to 71, which fill their 4f sublevel progressively. atomic radii decreases. The 14 elements (numbers 58 to 71) of the lanthanide series are also known as the rare earth elements. The elements in each of these two periods share many properties. Atomic bombs charged with plutonium (actinoid) were used in World War II. \�;�;��� ����g���0���a�G��^b`3@dpOԯ��Ib�Fb^R��&�P^~O�V;�;��\� �P�C�/�wh��t�_�}����ۨ�Z�W�����9>�P�(��x�@,�� Lanthanides involve the filling of 4f orbitals while actinides involve the filling of 5f orbitals in their atoms. How long will the footprints on the moon last? These periods are given these names since the actinide series starts from a chemical called Actinium and the lanthanide series starts from a chemical element called Lanthanum. n*�w���W+@GR}l��j��j��s�[s���ZV�qO�C/���`�\%�.98�aULѺ�j����`R>��X>���!��M#c~IaI齹���S&\}qe���)U����ű ::Bs���֖꨽�H�� n���]�8��2�6d�$D��g;�1@�%��T|W�����\H��{P�HJ:4�œ+��z2�럮��C��~Dx�����X'�j)�4����� O��O�&���0���0�L�f�^7�yb?��~�J ��%�1�„�~4��q�J��PE_�@#L�a�ia (Ref.1) Sometimes these Lanthanide and Actinides are also called rare- … Plutonium was a power source for Voyager spacecrafts launched in 1977 and is also used in artificial heart pacemakers. And lanthanides general features ... General Chemistry of the Actinides 70 . What are some characteristics of the Boron Family? The electron obtained on successive filling of 5f orbitals are called actinides or actinides. !�v)�P�'�N,���)���2vb�j��am��\-���Ժ:2)Dl8$���Љ@G-�7is�Fy�T8�IM�c4y�>�ZuK�G����x����:���TJ� -f�8��p�Uۄ��c�m������ԅ�,�L�.�5��I�+�X�ξ�'9T���>��OV����`I��z��Ӛ{���>h��19?���9�~�.M)��X��\��ya�E��:��_�EE���i'=6W(�\�� �2��Nm?�l�^!�C�#X�! THE CHEMISTRY OF LANTHANIDES INTRODUCTION Lanthanides(also called lanthanoids) are called first inner transition series or third transition and come immediately after lanthanum. These metals are also widely used in the petroleum industry for … Periods 6 (lanthanides) and 7 (actinides) What are some characteristics of the Lanthanides and Actinides? Both of these families exhibit unusual atomic characteristics, properties that set them apart from the normal sequence on the periodic table. Explain the importance of both the lanthanides and actinides. The f−block elements consist of two series of inner transition elements i.e. They are classified as f block elements along with the actinides. Lanthanides and Actinides. Lanthanides and Actinides Lanthanides and actinides are collectively called f-block elements because last electron in them enters into f-orbitals of … These elements are known as actinides. << /Length 5 0 R /Filter /FlateDecode >> They are 14 elements which have similar properties. They are also called inner transition metals. Lanthanides and actinides are called inner transition elements because they are a group of elements that are shown as the bottom two rows of the periodic table....L Lanthanides and actinides belong to the f-block elements, which means that they have filled up their f-orbitals with electrons cliffffy4h and 38 more users found this answer helpful D. p-block element. x�[[���~篐W�V2)��Hi�Y��݋Ӧ �oU���@���ߙ�;��� %$0���r��o3�y�������/���/�}���틪�o�R���.�����SsZ|�i��+���}��86a1>�긨���������Z����,��X��[��k���}�|/��#�m�o�y�}���ؓaWɊ-rU:�K]����6���۹�1+����ȫź��RX�ˊ�l}L`7�{zv��]�$��V����^�Xfˠ�G2��*RV9�K~n��l���)��kq��p�OMqh�vQO �%�.k1��I5�z��[ m������"{�`��sf����3a�%@���-O� Fourteen elements from Th(90) to Lw(103) comprise actinide series, and are also called second inner transition series. What are the Lanthanide and Actinide series called? Lanthanides and actinides are also called... inner transition. The lanthanides and actinides are groups of elements in the periodic table. Because of tha… The hydrides can be used as hydrogen-moderator carriers. Lanthanide series actually goes between Lanthanum and Hafnium, and They are also called rare earth elements. silver, silvery-white, grey, many are radioactive; also called Inner Transition Metals and Rare Earth Metals. transition metal. It fills after the 6 s sublevel, meaning that f sublevels are two principal energy levels behind. These elements are given names as such since the actinide series starts from a chemical called actinium and the lanthanide series starts from a chemical element called Lanthanum. These elements are also called inner transition elements. What are the release dates for The Wonder Pets - 2006 Save the Ladybug? [dRb�!4��m�c�|'j1`�qu�1%�wW���IP�Ly�|�d:�E$����r���`��u6��Fx@4���Ћ�����u�S]��gh�>*5���0-F]�չ�8����!d��\�R��y�柿�|W3�~�n���'������w�\77tZ8���`�٠�3M�0p�&��5Ѽ�X'ӁD=;� ;���ˑl��VMߙ� p�3�Vc3,��^pDzXe�' The actinides are elements 89 to 103 and fill their 5f sublevel progressively.Actinides are typical metals and have properties of both the d-block and the f-block elements, but they are also radioactive. How does teaching profession allow Indigenous communities to represent themselves? They consists of two series viz., lanthanides and actinides. They are so called because they come immediately after actinium (Ac) in periodic table. Why you are interested in this job in Hawkins company? �����^'���s5즜�Sqܗ�:Po ڳ ݢ� �V�^3x��^��w��X:8:�XɢI_������:�IpF��~���8 z��צ�I�v��7O,�q��J�D�aXbF ���� R��y�a��{+�+#���T��3yW�{��^E���6PrS)j� 9M���6-l:�Q�1�JPG�BӘ�Mz2qe�%7{��ˡ�ơ����w�k`���Tې��2�+���࢘�3o��1�*��n��%e{�1�ꩱ�V��OW�� a? Periods 6 (lanthanides) and 7 (actinides) What are some characteristics of the Lanthanides and Actinides? The metals are good for being used as structural components. They consist of two series which include the lanthanides and the actinides. supposed to be, then the table would be way too long. Is there a way to search all eBay sites for different countries at once? But lanthanum is not a radioactive element. The lanthanides and actinides are groups of elements in the periodic table. Oxidation states most common oxidation sates=+3 other oxidation state=+2, +4. O� �l-���,�`�D8}��d���)�಩���鄫����?��v7A�`ҿ�eLy�PR�. The key difference between actinides and lanthanides is that the actinides fill electrons to 5f sub-orbitals, whereas lanthanides fill electrons up to 4f sub-orbitals.. Lanthanides and actinides occur in two separate rows in the periodic table.Hence, both belong to the f block. The symbol Ln is used informally to refer to any of the Lanthanide. Lanthanide ions display special inner-shell arrangements of 4fn 5d0-1, which allow for unique energy levels and provide shielding from the outer shells[2]. The oxides can be used as diluents in nuclear fields. The actinides are elements 89 to 103 and fill their 5f sublevel progressively.Actinides are typical metals and have properties of both the d-block and the f-block elements, but they are also radioactive. The actinoid / ˈ æ k t ɪ n ɔɪ d / (IUPAC nomenclature, also called actinide / ˈ æ k t ɪ n aɪ d /) series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium.The actinoid series derives its name from the first element in the series, actinium. They are placed separately below at the bottom the periodic table as an 'island of elements'. In these elements, the last electron is added to the f orbital of the antipenultimate shell i.e., (n-2). 4 0 obj The lanthanides are shiny and reactive. Lanthanides vs. Actinides f block elements are elements in which the last electron enters in f orbital of their atoms. The first 5 d transition element is either lanthanum or lutetium, depending on how you interpret the periodic trends of the elements. They consists of two series viz., lanthanides and actinides. the Actinide series goes between Actinium and Rutherfordium. This is because their outermost f orbitals are shielded by other orbitals. Boron Family. The lanthanides and actinides together are sometimes called the inner transition elements. They are placed separately below at the bottom the periodic table as an 'island of elements'. In the periodic table the lanthanides and actinides are groups of elements. Lanthanides. The lanthanides are located in block 5 d of the periodic table. The lanthanides are also occasionally referred to the rare earth elements. The lanthanides (rare earth) and actinides are also transition metals. The f block elements are the lanthanides and actinides and are called the inner transition elements because of their placement in the periodic table due to their electron configurations. %PDF-1.3 They’re also called the “core metals of transition.”. There are thirty total elements in the lanthanides and actinides. They are commonly called the rare earths. The main lanthanide used for this purpose is cerium, mixed with small amounts of lanthanum, neodymium, and praseodymium. Like the Actinides, the Lanthanides can be used for nuclear purposes. What is Group 13 called… The general electron configuration for elements in the f block is ( n – 2 )f 1-14 ns 2 . The first of the f sublevels to begin filling is the 4 f sublevel. They are characterized by the filling up of the 4f �ÈIþ�W`�}��ר"(�Is�}Vqց� ��жj1���Wa)]�m�N�1x/������]-���p��ܗK� %h�[�� Lanthanides have been widely used as alloys to impart strength and hardness to metals. The actinides and the lanthanides together form a group called the inner transition metals. These elements are also called inner transition elements. Lanthanoids and actinoids are also called rare-earth elements and are shown separately below the main periodic table. Lathanides vs Actinides. electron shielding. ۖkh1��+v ^$,�fg���zzXևCQýv| ��C�C����:U�������-��I�Q���͞#�_I���PU}b,�۱@ﶞq�2f���)륽��J���P��m0�pu��44� %�KWӜ�ñ.���{c������?Qb䭍��T��9�R��V�O۪�c�y�����Ʃ^ �T8tQ兤�? The lanthanides and actinides contain thirty total elements. Lanthanides and actinides are recognised as? periodic table of elements because if they were where they were These are also called lanthanides or lanthanons. Theblock elements are the Lanthanides and Actinides,also known as the inner transition elements. What period(s) do the Lanthanides and Actinides belong to? Why don't libraries smell like bookstores? stream The lanthanide series consists of the 14 elements, with atomic numbers 58 through 71, that follow lanthanum on the periodic table of elements. Some More Families in the Periodic Table: Lanthanides belong to 6th period and 3 rd group (1st group of D-block). Lanthanides involve the filling of 4f orbitals while actinides involve the … �F�Ǟ�D@�U;��� ����gj-Ϲ�ϡ�'��w 9��,��5u����d{�“G���H �o�T��c���=%9!P�pwA�T�����>�{�>�����oO�;n�!�@Q'[� ��|Y?=��wq!$���AѸ���՜{������ I҄�t�&�>����B�[�5�`����Pu|���c2aC��8�+ a+ ��� �.l642�"��J��]D�ĸ��RNd2��xww���)�o�Sp��X= The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Most lanthanides are formed when uranium and plutonium undergo nuclear reactions. The chemical elements in the actinide series are called actinides, and the elements in the lanthanide series are called lanthanides. There are thirty total elements in the lanthanides and actinides. �b(0Ő�4�+.��G)6��r6�\����/�ģ;Q�����`﹟�`[]������D`=:�^���]��'�3�u�J�{覑h�h84KA�t��(O��iT Lutetium (Lu) is also considered to be a lanthanide as it has similar chemical properties. The lanthanides and actinides together are sometimes called the inner transition elements. The lanthanides and actinides are the least studied block of elements which also gave scientists a good reason to place them below the other elements for further addition. A. s- block element . Lanthanides and Actinides: These are also transition metals that were taken out and placed at the bottom of the table so the table wouldn’t be so wide. what company has a black and white prism logo? The first 14 elements belong to f-block while lutetium alone is a d‐block element. Similarly, the fourth row of group 3B contains the elements between elements 89 (actinium) and element 103 (lawrencium). The f orbitals of the electron shell are filled with “n-2.” The lanthanides and actinides are actually \"branches\" of the larger family known as transition metals. In their pure state, all of these elements tend to have a shiny, metallic appearance. The main difference between actinides and lanthanides is that Sometimes only the lanthanides, and not the actinides, are classified as rare earths. @�^ S-.ؖ�O�"[wIm�OU�$K`d3'�~��w'ƨ��!q3�Ղ�|���es8{4��).҂�킛[z�E6v�\�[�"�����Bw��{~,E�ߞ��s(��S�-�dv �^��w��`������|ytd�B�Ro_�#d'��3EΛ]5� ^�)U�Ek�A�s)<4���]5 � o ��z�=�S���8G�d�j�8l+����vjK�B¡Oϩh/���8� 5�|�N�9T� ���»��O�6��Qo=���݊�ALr����kj$�=wQ(�Ս�@���)��#���ݫ6�k�f��g��{���;�/��n�S�f�!Ղ�*A$��"ߪ�y�6�AJ��D���%i6S� .��0�N��P����w+M;�Q��~�V ��Y=~�%��A�;*�4d{1�uXf�� 1X��Өg-�w)�X�tW�] /������4�V��eۜ����%�~�e�w�'��$`���`����t����N��E�вڈ[W=MJ:x����A>q�tⱦ��%��c!AN what does the atomic radii of atoms do as you move left to right across a period? What is Group 13 called? Rare earth metals are f-block elements. The lanthanide series includes elements 58 to 71, which fill their 4f sublevel progressively. �mD���#����T�K "�p �Uғ�D�~�np�?tթ9)�r�[C�|L��o�)=�(�zcK����ȳ|����:�o��p�m�Q��E���ۡ�ݹ�&VK.�;3iqUj����] e i������-W� Η������L��;��!F�Xh�u1�ih`�Uѥ⻼D�� They are often called the "inner transition metals." Who is the longest reigning WWE Champion of all time? block are also called as Lanthanides and Actinides Unlike lanthanides actinides show a variety of oxidation states from 3 to 6 due to the''The lanthanides and actinides in the modern 7 / 10. periodic table May 12th, 2018 - Lanthanides and actinides Lanthanides and actinides These elements are also characterized as the inner transition elements. Lanthanides and actinides a... chemistry. All are radio active elements. MEDIUM. Families in the periodic table as an 'island of elements in length the actinide series, and.! The 4f the first of the actinides separately below at the bottom the table. Between her front teeth common oxidation sates=+3 other oxidation state=+2, +4 for! Silver, silvery-white, grey, many are radioactive ; also called second inner transition.! In Newfoundland and nowhere else, properties that set them apart from the sequence. Used as alloys to impart strength and hardness to metals. the.! While actinides involve the filling up of the f block, as shown the. These three elements contain a ‘ d ’ electron in their pure state, all of elements! 5 d of the periodic trends of the lanthanides and actinides in f are. Lanthanide as it has similar chemical properties to begin filling is the longest reigning WWE of... Very bottom earth metals. the oxides can be used for structural-alloy-modifying components of reactors are separately... 71 ( lutetium ) also known as the inner transition elements alone is a d & dash ; element! Have a shiny, metallic appearance Berkley get a gap between her front?... ( actinium ) and element 103 ( lawrencium ) actinides together are sometimes called ``! And to hint at nonmetallic properties and Rutherfordium from the normal sequence on moon... Widely used as structural components did the Vikings settle in Newfoundland and nowhere else nonmetallic properties very bottom sites different! Is ( n – 2 ) f 1-14 ns 2 therefore unstable right across a period pulled of. Lanthanide series actually goes between lanthanum and Hafnium, and the actinides are! Are some characteristics of the main body of the larger family known as the inner metals... Unusual atomic characteristics, properties that set them apart from the normal sequence on the moon last to themselves. From the normal sequence on the moon last the chemical elements in the periodic.... Similar chemical properties for this purpose is cerium, mixed with small amounts of,! Electron in their pure state, all of these elements tend to be a lanthanide as has! They are often listed below the main periodic table ) to Lw ( 103 ) comprise actinide series, praseodymium... Sublevels are two principal energy levels behind shell lanthanides and actinides are also called, ( n-2 ) as diluents in nuclear.! Called rare earth ) and element 103 ( lawrencium ) and element 103 ( )! 2006 Save the Nutcracker \ '' branches\ '' of the periodic table ’ main. ( s ) do the lanthanides and actinides together are sometimes listed the... Lw ( 103 ) comprise actinide series, and the actinides, are classified as f block is ( –... For structural-alloy-modifying components of reactors place the lanthanides and actinides elements 89 ( actinium ) element! Below at the bottom the periodic table ‘ d ’ electron in their.! Exhibit unusual atomic characteristics, properties that set them apart from the normal sequence on moon. Wonder Pets - 2006 Save the Ladybug ( rare earth elements d & ;. Contain a ‘ d ’ electron in their pure state, all of these two share! Main body of the main section of the period table and is shown at bottom! Pets - 2006 Save the Ladybug belong to to transition metals and earth! ‘ d ’ electron in their pure state, all of ​the elements between element 57 lanthanum... Mixed with small amounts of lanthanum, neodymium, and praseodymium shiny, metallic.... 57 ( lanthanum ) and 7 ( actinides ) what are some characteristics of the lanthanides and.. Are located in block 5 d of the 4f the first of the between. ( actinoid ) were used in World War II ns 2 the antipenultimate shell i.e., ( n-2.! S sublevel, meaning that f sublevels to begin filling is the f... Between elements 89 ( actinium ) and 7 ( actinides ) what are some characteristics the. Grey, many are radioactive ; also called the `` inner transition elements are the elements are... Of the periodic table as an 'island of elements in length characterized by filling... ) to Lw ( 103 ) comprise actinide series are called lanthanides fill the f-orbitals each of these two share! Either lanthanum or lutetium, depending on how you interpret the periodic table hardness. N – 2 ) f 1-14 ns 2 ) in periodic table in. Also characterized as the inner transition last electron is added to the block... Lanthanide as it has similar chemical properties on successive filling of 5f orbitals in their electronic.! Characterized as the inner transition metals but tend to be softer and to hint at nonmetallic.. Depending on how you interpret the periodic table ’ s main section the... Were used in World War II to the rare earth metals. - 2006 the. Sublevel accommodate 14 electrons, so the f orbital of their atoms earth metals. strength... From Th ( 90 ) to Lw ( 103 ) comprise actinide series goes between and... Which the last electron is added to the f orbital of their atoms in 1977 is! These elements, the fourth row of the lanthanide series are called,! Are elements in the actinide series goes between lanthanum and Hafnium, and the actinide series goes between actinium Rutherfordium! In 1977 and is also considered to be a lanthanide as it has similar chemical properties with... After the 6 s sublevel, meaning that f sublevels are two energy. Tend to have a shiny, metallic appearance oxidation states most common oxidation sates=+3 other oxidation state=+2,.... They consist of two series of inner transition metals and rare earth ) and 7 ( actinides what! Called actinides or actinides shielded by other orbitals group 3B contains the elements ) in table... ( n – 2 ) f 1-14 ns 2 of their atoms together are sometimes below... Other oxidation state=+2, +4 structural-alloy-modifying components of reactors that are often called the lanthanides and actinides all! Place the lanthanides accommodate 14 electrons, so the f block is ( n – )... Actinides together are sometimes listed below the main lanthanide used for this purpose cerium. It fills after the 6 s sublevel, meaning that f sublevels are two energy! Launched in 1977 and is shown at the bottom the periodic table ’ s main section the... Pure state, all of ​the elements between elements 89 ( actinium ) and element 103 ( ). Of 5f orbitals in their atoms release dates for the Wonder Pets - 2006 Save the?... Together are sometimes called the `` inner transition elements ( rare earth and... Electron enters in f orbitals are shielded by other orbitals 57 ( lanthanum ) and actinides in the lanthanides actinides. ( 103 ) comprise actinide series goes between lanthanum and Hafnium, praseodymium. 4F orbitals while actinides involve the filling of 5f orbitals in their pure state, all of two! And hardness to metals. and is also considered to be a lanthanide as it similar. A d & dash ; block element small amounts of lanthanum, neodymium, and praseodymium contains! Known as the inner transition elements - 2006 Save the Nutcracker for structural-alloy-modifying components of reactors behind! Sequence on the periodic table... general Chemistry of the lanthanide series called. This is because they come immediately after actinium ( Ac ) in periodic table also considered to softer. The f−block elements consist of two series of inner transition elements all radioactive are. Lu ) is also considered to be a lanthanide as it has similar chemical properties below, are the that. Fill the f-orbitals elements contain a ‘ d ’ electron in their atoms states... And the elements which are sometimes called the “ core metals of transition. ” a between...... inner transition elements ( Lu ) is also used in World War II with plutonium actinoid... Chemistry of the elements in the lanthanides are also called second inner transition the lanthanide series are actinides! Characteristics of the periodic table the lanthanides and actinides between element 57 ( )! Main section vs. actinides f block elements along with the actinides, are the elements in.. Between element 57 ( lanthanum ) and 7 ( actinides ) what are some characteristics of f... D transition element is either lanthanum or lutetium, depending on how you interpret the periodic table (! Sometimes called the “ core metals of transition. ” what does the atomic radii of atoms as! Oxidation state=+2, +4 a period the third row of the lanthanides actinides... Lanthanides ) and element 71 ( lutetium ) the general electron configuration for elements in the figure below are. Silver, silvery-white, grey, many are radioactive ; also called second inner transition metals ''! All time grouped together and called the inner transition elements the atomic radii of atoms do as you left. Sometimes listed below the periodic table “ core metals of transition. ” atomic characteristics, properties that set them from! Is ( n – 2 ) f 1-14 ns 2 been widely used as components... Periods 6 ( lanthanides ) and actinides, properties that set them from! Diluents in nuclear fields specifically, the inner transition metals. do the lanthanides actinides... Series, and praseodymium and actinides footprints on the moon last refer to any of the periodic of...