use the periodic table to answer the following questions. how many valence electrons does magnesium have?
use the periodic table to answer the following questions. how many valence electrons does magnesium have?
Answer
Explanation:
Step1: Locate magnesium on periodic table
Magnesium (Mg) has atomic number 12.
Step2: Write electron - configuration
The electron - configuration of Mg is 1s²2s²2p⁶3s².
Step3: Identify valence electrons
Valence electrons are in the outermost shell. For Mg, the outermost shell is the 3rd shell with 2 electrons.
Answer:
2