The electronic configuration of an element X is 2, 8, 8, 2. To which (a) period and (b) group of the modern periodic table does X belong? State its valency. Justify your answer in each case.
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Answered by
9
Answer:
X is Calcium.
Electronic Configuration (2,8,8,2)
(a) Number of valance electron in it is 2.
so it belongs to group 2.
(b) It has 4 number of shells.
so it belongs to period 4.
It's valency is 2 .
Answered by
2
Answer:
a) 4th period
b) II nd group
Its valency is 2.
The element is calcium. its electronic configuration is 2,8,8,2. It is placed in second group and forth period of the modern periodic table and has a valency of 2.
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