Point out the property which is not characteristic of alkali metal:
Correct answer: D. High ionization energy
- A. Low electronegativity
- B. Low melting point
- C. Their ions are isoelectronic with noble gas
- D. High ionization energy
Explanation
Alkali metals have low ionization energies due to their larger atomic radii.
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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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