Which of the following statement is incorrect? (a) The atomic radiu...

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Which of the following statement is incorrect?
(a) The atomic radius of \( \mathrm{Na} \) is greater than that of \( \mathrm{Mg} \)
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(b) Metallic bond of \( \mathrm{Mg} \) is stronger than the metallic bond in \( \mathrm{Na} \)
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(c) Melting and boiling points of \( \mathrm{Mg} \) are greater than those of \( \mathrm{Ca} \)
(d) \( \mathrm{Mg} \) and \( \mathrm{Ca} \) are the most abundant elements amongst the alkaline earth metals
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