Question

8. Write the names from the description.
a. The period with electrons in the shellsK, L and M.
b. The group with valency zero.
c. The family of nonmetals having valency one.
d. The family of metals having valency one.
e. The family of metals having valency two.
f. The metalloids in the second and third periods.
g. Nonmetals in the third period.
h. Two elements having valency 4.

Answer 1

8. Write the names from the description.

a. The period with electrons in the shells K, L and M.

⇒ Third period
b. The group with valency zero.

⇒ Group-8   noble gases

c. The family of nonmetals having valency one.

⇒ Halogens 
d. The family of metals having valency one.

⇒Alkali metals
e. The family of metals having valency two.

⇒ Alkaline Earth Metal
f. The metalloids in the second and third periods.

⇒ Boron and silicon
g. Nonmetals in the third period.

⇒phosphorus, sulphur and chlorine
h. Two elements having valency 4.

⇒ carbon and silicon