Question

The element x in group 17 has 3 shells write the complete sub shell electronic configuration

Answer 1

Answer:

2:8:7

Explanation:

The first shell can accommodate a maximum of 2 electrons, while the second level accommodates a maximum of 8 while the third last cell takes up the remaining 7 electrons

Answer 2

The electron configuration would be:

1s^2 2s^2 2p^6 3s^2 3p^5