9. Sulfur has atomic number 16 and belongs to period 3 and family 6A in the periodic table? What
number of valence electrons of sulfur?
A 3
B. 6
C. 16
D. 18
10. What element has the electron configuration 152 282 2p 3s 3p 452 301?
A. Ar
B. Ca
C. Ni
D.Sc
B. 2p​