group 2\n4\nbe\nberyllium\n9.012\n12\nmg\nmagnesium\n24.305\nhow many valence electrons are in…
group 2\n4\nbe\nberyllium\n9.012\n12\nmg\nmagnesium\n24.305\nhow many valence electrons are in magnesium?\n1\na\n2\nb\n3\nc
Answer
Explanation:
Step1: Locate magnesium in periodic table
Magnesium (Mg) has atomic number 12.
Step2: Determine electron - shell configuration
The electron - shell configuration of Mg is 2, 8, 2.
Step3: Identify valence electrons
Valence electrons are in the outermost shell. So, Mg has 2 valence electrons.
Answer:
B. 2