Question

Element P has atomic number 19. To which group does P belongs to ?

• A. 1
• B. 2
• C. 17
• D. 16

Answer 1

The correct option is A 1

Electronic configuration -$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^1$.We have 19 electrons in that with valence shell 4 hence period is 4 and valence electron 1 hence group number is 1 and it has to donate electrons to get octet configuration.Hence it is a metal.