Question

Which of the following metals has the highest melting point ?

• A. $Be$
• B. $Mg$
• C. $Ca$
• D. $Ba$

Answer 1

The correct option is A $Be$

Beryllium has highest melting point (1560 K).
In fact, the melting point, the boiling point and the ionisation enthalpy of beryllium are highest of all the alkaline earth metals. This is due to small atomic size of beryllium. Hence, the correct answer is option (b).