Name the elements in period 1.
Hydrogen (H) and helium (He) are the only 2 elements in Period 1.
how do 6th period in modern peroidic table has 32 elements?
An element X with atomic no.=22 belongs to the 4th period of peroidic table. How many no. of shells present in element X and why??
Name the following:
The elements present in Period 1.