Igcse Model Questions Vol1 2019 Chemistry Question 21
Practice objective / multiple choice question 21 from the 2019 Igcse Model Questions Vol1 Chemistry examination.
Calcium has an atomic number of \(20\). Using the principle that electrons fill shells in the order \(2, 8, 8, 2\), determine how many electrons are in the outermost (valence) shell of a neutral calcium atom.
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About This Question
This is Igcse Model Questions Vol1 2019 Chemistry Question 21. It is one of the objective questions from the 2019 Igcse Model Questions Vol1 Chemistry examination.
Difficulty level: Easy .
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