How many valence electrons are in an atom of magnesium?
2 Answers
Jan 7, 2014
Magnesium has two valence electrons.
Magnesium is element 12 and belongs to Group 2 of the Periodic Table. An element in Group 2 has two valence electrons.
Also, the electron configuration of Mg is 1s² 2s²2p⁶ 3s² or [Ne]3s². Since the 3s² electrons are the outermost electrons, magnesium has two valence electrons.
Dec 23, 2014
Magnesium has two valence electrons.
Explanation:
The electron configuration for magnesium is shown below.
The valence elctrons are the electrons in the third energy level (3s sublevel has two electrons in an atom of Mg)
Here is a video which discusses how to determine the electron configuration of magnesium.