Deuterium reacts with oxygen to form________________?
Correct answer: B. Heavy water
- A. Hard water
- B. Heavy water
- C. Soft water
- D. Water gas
Explanation
Deuterium is the heavy isotope of hydrogen, so its oxide is D2O, commonly called heavy water. The likely distractor is a, hard water, but hardness is caused mainly by dissolved calcium or magnesium salts, not by replacing ordinary hydrogen with deuterium.
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About Reactions of Group I Elements
Group I elements have one valence electron, so their reactivity increases down the group as ionisation energy decreases. Their reactions with water, oxygen, hydrogen and halogens produce hydroxides, oxides, hydrides and halides, while the behaviour of lithium differs from the heavier metals because of its small ionic size.
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