CORRECT-INCORRECT STATEMENT Which of the following statement is incorrect? (1) The atomic radius...

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CORRECT-INCORRECT STATEMENT
Which of the following statement is incorrect?
(1) The atomic radius of \( \mathrm{Na} \) is greater than that of \( \mathrm{Mg} \).
(2) Metallic bond of Mg is stronger than the metallic bond in \( \mathrm{Na} \).
(3) Melting and boiling points of Mg are less than those of \( \mathrm{Ca} \).
(4) Mg and Ca both impart characteristic colour to the flame.
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