alleryStart learning →Which of the following is an alkaline earth metal?
AMagnesium
BSodium
CAluminium
DChlorine
Answer & Solution
Correct answer: A. Magnesium
1. Alkaline earth metals are in Group 2.
2. They have two valence electrons each.
3. Magnesium is a Group 2 element.
4. Sodium is alkali; aluminium is Group 13; chlorine is a halogen.
5. So magnesium is the alkaline earth metal.
_Source: Selina Concise Chemistry ICSE Class 9, Ch 5 'The Periodic Table'_
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