Howmany unpaired electrons are there in theground state electron config of tellurium,bromine,calcium and zinc?

Answer 1

spin pair (one up and one down)

Tellurium: [Kr] 4d10 5s2 5p4
of the 4 electrons in the 5p, 2 are paired and 2 are unpaired.

Bromine: [Ar] 3d10 4s2 4p5
of the 5 electrons in the 4p, 4 are paired and 1 is unpaired.

Calcium: [Ar] 4s2
both 4s electrons are paired.

Zinc: [Ar] 3d10 4s2
both 4s electrons are paired.