Why does water have a lower melting point than sodium oxide?

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Sodium oxide is an ionic compound with a strong lattice.

Why is melting point of ammonia lower than water?

The melting point of a substance is based upon the polarity of the bonds that make up the substance. In water, the O-H bond has a difference in electronegativity of 1.4 (Pauli

Why does potassium have a lower melting point than sodium?

Because it has a fourth shell which means it's valence electrons are further from the nucleus (protons) meaning that there is less attraction between it's electrons and proton

Does caesium have higher or lower melting points than sodium and why?

The melting point of caesium will be greater because of random, temporary dipoles caused by moving electrons called London dispersion forces. The bigger the electron cloud of

Why the melting point of magnesium oxide is much higher than sodium chloride?

The sodium ion has a 1+ charge and the chloride ion has a 1- charge. By comparison the magnesium ion has a 2+ charge and the oxide ion a 2- charge. Because the charge diff