Question

To which group and period does the element belong if the electronic configuration of an element in its $-2$ oxidation state is $1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6}$ ?

• A. period 3 . group 16
• B. period 3 . group 17
• C. period 4 . group 16
• D. period 4 . group 17

Answer 1

Answer: (A)

period 3 . group 16

Answer 2

Electronic configuration $=1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}, 3 p^{6}$ $=16$ electrons Sulphur $(Z=16)$ refer to group 16 and period $3 .$ Sulphur show- 2 oxidation state.