Question

What would be the atomic number of the next Alkali metal and alkaline earth metal, if

discovered in future. Find out where it would be placed in the periodic table.​

Answer 1

Explanation:

Francium(Z=87) is the last member of alkali group known till today. It is the first member of 7th period. 7th period would accommodate 32 elements as 7s,5f,6d and 7p-orbitals would be successively filled if all the elements are discovered. Thus, the last member of this period will have atomic number 118.

Answer 2

Answer:

Francium(Z=87) is the last member of alkali group known till today. It is the first member of 7th period. 7th period would accommodate 32 elements as 7s,5f,6d and 7p-orbitals would be successively filled if all the elements are discovered. Thus, the last member of this period will have atomic number 118.

The next alkali metal, if discovered will be the first member of 8th period(configuration 8s^1) and it's atomic number will be118+1=119 or (87+32)=119.

Hope it helps