Short Answer Type
Long Answer TypeShort Answer TypeThe number of elements in each block are:
(i) s-block: There are 13 elements in s-block. Except the first period (having only one element), each other period of the block has 2 elements.
(ii) p-block: There are 31 elements. With the exception of first period (having only one element), each other period has got 6 elements.
(iii) d-block: This block has 40 elements. Each period i.e. fourth, fifth, sixth and seventh of the block has got 10 elements.
(iv) f-block: This block has 28 elements in the form of 2 horizontal rows of 14 elements each.
Lanthanoides = 14 elements.
Actinoides = 14 elements
Long Answer TypeShort Answer TypeLanthanoides and actinodes are placed in separate rows at the bottom of the periodic table. Explain the reason for this arrangement.
Long Answer TypeShort Answer TypeName the block to which the elements with following valence shell electronic configurations belong:
(i) 3s2 3p5
(ii) 3d104s2
(iii) 3p64s2
(iv) 6s2 4f0
(v) 4s1 3d5
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