Question

1) What is a column called in the periodic table and what do the

elements in each column have in common?
A)
period; the same atomic mass
B)
group; the same number of electrons
C) period; the same number of atomic orbitals
D) group; the same number of valence electrons

Answer 1

D.group;the same number of valence electron

Step-by-step explanation:

for eg O It Has 8 Atomic No 2,6

S It Has 16 Atomic No 2,8,6