1 point
6.An element has atomic
number 20 and in group 2 and
period 4. Which option gives
the number of valence
electrons and shells present in
the element? *
3 and 8
4 and 2
O2 and 4
O 3 and 2
Answers
Answered by
26
Answer:
option c is the correct answer.
2 and 4
Explanation:
number of valence electron = 2
4S2 sub-shell , so sub-shell is 4s
and it is Ca (calcium)
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Answered by
1
Answer:
4 and 2 are correct answer
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