Question

An element has its electron configuration as 2,8,2 then : a) What is the valency of this element? b) To which period does this element belong?
A) valency 3 , period 2
B) Valency 8, period 3
C) valency 2, period 3
D) none of these​

Answer 1

Answer:

Magnesium

Option C

Explanation:

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