How many sub-shell are there in N shell ? How many orbitals are there in d sub-shell ?

Explanation

For N shell principle quantum number is ` n = 4` ,Number of sub-shell in an energy level`n`, :. Number of sub-shells in N shell `= 4` ,For d subshell, `1 = 2 `
Number of orbitals in a sub-shell` = 2l+ 1`
gt Number of orbitals in a sub-shell` = 2xx 2+ 1= 5`