Question

What is common to all elements in the same group in the periodic table?

A.
They have the same number of neutrons.

B.
They are all nonmetals.

C.
They have the same number of outer electrons.

D.
Their properties are very different.

Answer 1

C

Answer 2

C

Answer 3

Lithium, Sodium and Potassium all lie in the first group and all have the same number of outermost electron... 1