Question

Name
(a) three elements that have a single electron in their outermost shells.
(b) two elements that have two electrons in their outermost shells.
(c) three elements with filled outermost shells

Answer 1

a. sodium
b. calcium 
c. argon

Answer 2

SOLUTION :-

a. Sodium (Na) , Lithium (Li) , Potassium (K)

b. Magnesium (Mg), Beryllium (Be)

c. Neon (Ne), Argon (Ar), Helium (He).

-VARTIKA