Sodium metal shows metallic luster is explained by
Correct answer: B. Oscillation of loose electrons
- A. Diffusion of Na+
- B. Oscillation of loose electrons
- C. Excitation of free protons
- D. Strong crystal lattice
Explanation
Option B is correct since the luster of sodium metal is due to the oscillation of the loose electron of sodium metal. As sodium metal has only one valence electron. This valence electron undergoes excitation and thus gives color and luster to the metal.Option A is incorrect since diffusion of Na+ is not the correct reason for the metallic luster.Option C is incorrect since the excitation of free protons is not the correct reason for the metallic luster.Option D is incorrect since strong crystal lattice is not the correct reason for the metallic luster.
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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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