Question

How many elements can be accommodated in the present set up of the long form of the periodic table? Explain.

Answer 1

118 elements can be accommodated in the present set up of the long form of the periodic table. It can be explained as below- In the present set up of the long form of the periodic table, we have 18 groups, 7 periods and four blocks (s, p, d and f block elements). 

So, the maximum number of elements which can be accommodated in the present set up of the long form of the periodic table in accordance with Aufbau principle is –

1s² , 2s² 2p⁶ , 3s² , 3p⁶ 4s² , 3d¹⁰ , 4p⁶ 5s² , 4d¹⁰ 5p⁶ , 6s² , 4f¹⁴5d¹⁰ , 6p⁶ , 7s² , 5f¹⁴6d¹⁰ , 7p⁶

=118