Give the name and atomic number of the inert gas atom in which the tot

1.	Give the name and atomic number of the inert gas atom in which the total number of d-electrons is equal to the difference in numbers of total p and s-electrons.
Answer» The first inert gas which contains d-electrons is krypton. Its atomic number is 36 and its electronic configuration is: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶. Total number of d-electrons = 10 Total number of p-electrons = 6 + 6 + 6 = 18. Total number of s-electrons = 2 + 2 + 2 + 2 = 8. ∴Difference in total number of p- and s-electrons = 18 - 8 = 10. Thus, the inert gas is krypton.

Give the name and atomic number of the inert gas atom in which the total number of d-electrons is equal to the difference in numbers of total p and s-electrons.

Answer»

The first inert gas which contains d-electrons is krypton. Its atomic number is 36 and its electronic configuration is:

1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶.

Total number of d-electrons = 10

Total number of p-electrons = 6 + 6 + 6 = 18.

Total number of s-electrons = 2 + 2 + 2 + 2 = 8.

∴Difference in total number of p- and s-electrons = 18 - 8 = 10.

Thus, the inert gas is krypton.