Identify each element below, and give the symbols of the other elements in its group:

(a) [He] 2s²2p²

(b) [Ar] 4s²3d³

(c) [Ne] 3s²3p³

Answer in explanation

Explanation:

a. Carbon, atomic number 6

Helium has 2 electrons. We add this to the other 4 to make 6

Other group elements: Silicon Si, Germanium Ge, Tin Sn, lead Pb, Flerovium Fl

b. Vanadium, atomic number 23

Argon has 18 electrons, we add 5 to the 18 to make 23

Other group members are: Niobium Nb, Tantalum Ta, Dubnium Db

c. Phosphorus, atomic number 15

Neon has atomic number of 10

Other group members are: Nitrogen N, Phosphorus P, Arsenic As, Antimony Sb, Bismuth Bi and Moscovium Mc