Question

Write the names from the description.
a. The period with electrons in the shells K, 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

a. The period with electrons in the shells K, L and M = 3 period
b. The group with valency zero = 18 group
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 metals
f. The metalloids in the second and third periods = Boron( second period), Silicon (third period)
g. Nonmetals in the third period = Sulphur, Chlorine
h. Two elements having valency 4 = Carbon, Silicon