match each set of quantum numbers to the correct subshell description by typing in the correct number.\n1: n…

Explanation:

Step1: Recall quantum - number rules

The principal quantum number $n$ represents the energy level, and the angular - momentum quantum number $l$ determines the subshell type ($l = 0$ is an $s$ - subshell, $l=1$ is a $p$ - subshell, $l = 2$ is a $d$ - subshell, $l=3$ is an $f$ - subshell).

Step2: Match $n = 2$, $l = 0$

Since $l = 0$ is an $s$ - subshell and $n = 2$, it is the $2s$ subshell. So, for $2s$, the number is 1.

Step3: Match $n = 3$, $l = 2$

Since $l = 2$ is a $d$ - subshell and $n = 3$, it is the $3d$ subshell. So, for $3d$, the number is 2.

Step4: Match $n = 1$, $l = 0$

Since $l = 0$ is an $s$ - subshell and $n = 1$, it is the $1s$ subshell. So, for $1s$, the number is 3.

Step5: Match $n = 2$, $l = 1$

Since $l = 1$ is a $p$ - subshell and $n = 2$, it is the $2p$ subshell. So, for $2p$, the number is 4.

Step6: Match $n = 4$, $l = 3$

Since $l = 3$ is an $f$ - subshell and $n = 4$, it is the $4f$ subshell. So, for $4f$, the number is 5.

Answer:

2p: 4 3d: 2 2s: 1 4f: 5 1s: 3