Question

question 1 of 32 which sublevel contains valence electrons in an atom of magnesium (mg)? the periodic table a. 2p b. 2s c. 3p d. 3s

Explanation:

Magnesium has an atomic number of 12. Its electron - configuration is 1s²2s²2p⁶3s². Valence electrons are the outermost electrons. The outermost sub - level for magnesium is 3s, which contains 2 valence electrons.

Answer:

D. 3s