Interpretation:
The term valence electrons needs to be explained and the number of valence electrons of magnesium atom needs to be determined.
Concept introduction:
Electrons which are present in the outer most orbital of an atom refer to as valence electron.
Answer to Problem 78A
Electrons of outer most orbital of an atom refer to as valance electron
The magnesium atom has 2 valence electrons.
Explanation of Solution
Given information:
Magnesium atom.
Electrons of outer most orbital of an atom refer to as valence electron.
The electron configuration of magnesium is
The outermost orbital of magnesium is
The magnesium atom has
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