How many periods are called short periods in the long form of the periodic table Give their : (i) - Science - Periodic Classification of Elements

Question

How many periods are called short periods in the long form of the
periodic table? Give their : (i) periodic numbers, (ii) number of
elements in each period, (iii) name one element in each period

Geetha · Accepted Answer

The first three periods are called short period

a The periodic numbers are 1,2,3

b The first period has 2 elements
Second period has 8 elements
Third period has 8 elements

c First period has H and He - one element name Hydrogen
Second period has Li to Ne - one element name - Lithium
Third period has Na to Ar - one element name - Sodium

How many periods are called short periods in the long form of the periodic table? Give their : (i) periodic numbers, (ii) number of elements in each period, (iii) name one element in each period.