How many neutrons are in aluminum?
How many protons are in aluminum?
How many electrons are in the first valence?
How many electrons are in the 2nd valence?
How many electrons are in the 3rd valence?
How many neutrons are in calcium?
How many protons are in calcium?
How many electrons are in the first valence?
How many electrons are in the 2nd valence?
How many electrons are in the 3rd valence?
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