The electronic configuration of $Cu^{2+}$ ion is

The subshell that arises after $f$ is called $g$ subshell.
$(a)$ How many $g$ orbitals are present in the $g$ subshell?
$(b)$ In what principal electronic shell would the $g$ subshell first occur and what is the total number of orbitals in this principal shell?

Under normal conditions,which of the following electronic configurations is able to form a dipositive ion?

Aqueous solution of which salt will not contain ions with the electronic configuration $1s^2 \, 2s^2 \, 2p^6 \, 3s^2 \, 3p^6$?

Pauli's exclusion principle states that

Beryllium's fourth electron will have the four quantum numbers :