Question

Name the following:
a. An element having atomic number 17
b. The outermost shell of an atom
c. The vertical columns in the periodic table

Answer 1

Answer:

a. Chlorine

b. Valence shell

c. Groups

Answer 2

Your answers are :-

a. Barium is an element having atomic number 17.

b. The outermost shell of atom is known as the valence shell.

c. The vertical columns on the periodic table are called groups or families.