Question #07af6

1 Answer
Oct 26, 2017

4, 1, 1, 1/212

Explanation:

Element 31 is gallium. It is in the 4th row. So your principal quantum number is 4. Be careful though, as the transition metals work differently.

The angular momentum ll is 1 because it is in the p-block, so we label it p.

The last electron is the first in the 4p shell so the next quantum number is 1.

Spin, the final quantum number, is 1/212 simply because each electron has a positive or spin, and 2 electrons cancel out. This one electron in the 4p shell is not cencelled out.

It's helpful to memorize the order of electron shells, listed here:
images.flatworldknowledge.comimages.flatworldknowledge.com
The diagonal arrows represent ascending order, starting at 1s and ending at 8s
Source: https://catalog.flatworldknowledge.com/bookhub/2273?e=ball-ch08_s03