Question #3df7e

1 Answer
Apr 28, 2017

Answer:

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 # 1s^2 2s^2 2p^6 3s^2 3p^6#

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

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