# Question #3df7e

Apr 28, 2017

Most likely 3 3d electrons.

#### Explanation:

Chromium is number 24 so the neutral atom starts with 24 electron.

18 of these electrons are found in the 3rd shell $1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{6}$

This leaves 6 valance electrons.. Three of these electrons have been lost leaving three valance electrons.

Generally transition metals lose the $4 {s}^{2}$ electrons first. So the 2 4s electrons and 1 3d electron would most likely be lost leaving 3 electrons in the 3d orbitals.