Sodium chloride (NaCl) is an ionic compound that we consume everyday as a table salt, what is the reason that the structure of the ionic compound causes the compound to be hard
and shiny? *

See Explanation

Explanation:

Ionic compounds are composed of crystals. The crystal structure of an ionic compound is responsible for its hardness.

A crystalline solid contains a well organized structure which enables it to be hard and have a particular geometric shape as well defined melting point.

Hence, all the observed characteristics of NaCl are the result of its crystalline structure.

1. they vary with a higher number because boiling is way hotter than melting

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