Write the scientific reason for elements belonging to the same group has the same valency.
Important Questions on Periodic Classification of Elements
Write the scientific reason for the third period contains only eight elements even though the electron capacity of the third shell is .
Write the names from the description.
The period with electrons in the shells K, L and M.
Write the names from the description.
The group with valency zero.
Write the names from the description.
The family of nonmetals having valency one.
Write the names from the description.
The family of metals having valency one.
Write the names from the description.
The family of metals having valency two.
Write the names from the description.
The metalloids in the second and third periods.
Write the names from the description.
Nonmetals in the third period.
