Question

(1) What is the name of the element with a valence electron configuration of 2s²2p²?

(2) What is the name of the element with a valence electron configuration of 4s²4p⁵?

Answer 1

1. 2s²2p² is the valence electrons of an element in group IV period 2. The element is carbon and its electron configuration is 1s²2s²2p²
2. 4s²4p⁵ is the valence electrons for an element in group VII and period 4. The element is, therefore, Bromine and its electron configuration is [Ar]3d¹⁰4s²4p⁵