Question

Which of the following have the same number of
electrons in outermost shell?
1) Elements with atomic numbers 30,48, 80
2) Elements with atomic numbers 14, 15, 16
3) Elements with atomic numbers 20,30,50
4) Elements with atomic numbers 10,18,26​

Answer 1

Answer:

The answer for question is 1)

Answer 2

Explanation:

Z Element No. of electrons/shell Group

1 Hydrogen 1 1

2 Helium 2 18

3 Lithium 2, 1 1