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Leya [2.2K]
3 years ago
13

We call the elements in the blocks of periods 4-7 and groups 3-12 the

Chemistry
1 answer:
d1i1m1o1n [39]3 years ago
7 0
The elements in the blocks of period 4-7 and group 3-12 in the periodic table are in the d-block and d-block elements  are known as transition metals or transition elements.
Arsenic is a metalloid and it has four electron shells and five valence electrons.
the s and p orbital of Arsenic have 2 and 3 electrons respectively and which makes five valence electrons.



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