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Practice mode s- and p-Block Elements

What is formed when magnesium is heated in steam?

Correct answer C. Magnesium oxide and hydrogen

Explanation

Magnesium reacts only very slowly with cold water, but with steam it burns to give magnesium oxide and hydrogen: Mg + H₂O → MgO + H₂.

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Question 04 s- and p-Block Elements

Why is the first ionisation energy of aluminium lower than that of magnesium?

Correct answer A. The electron removed from Al is in a 3p orbital, which is higher in energy and partly shielded by 3s electrons

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