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Moderate

Coulombic Forces

APCHEM-TFCVGX

Which of the following statements BEST explains the difference in melting points between $MgO$ (2852$^o$C) and $NaF$ (1819$^o$C)?

A

Sodium, being an alkali metal, is more reactive than magnesium, an alkaline earth metal.

B

Magnesium and oxygen have higher charge values and therefore have greater Coulombic attractions.

C

Fluorine is more electronegative than oxygen.

D

The oxide ion is larger than the fluoride ion.