Chemistry, asked by punamgupta947, 4 months ago

Three elements P Q and R have atomic number 4, 12 and 20 respectively a) state the number of valence electron in each of the elements.

Answers

Answered by gurpartap2407

1

Answer:

In all there are 2 valence electron

Answered by vineetmalik60

0

Answer:

2 in each element

Explanation:

P-2,2

Q-2,8,2

R-2,8,8,2

All elements have 2 atom in outermost shell so valance electron are 2

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