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B
Covalent network
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C
Metallic
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D
Covalent molecular
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E
Amorphous
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Solution
The correct option is E Amorphous Crystals tend to have relatively sharp, well-defined melting points
because all the component atoms, molecules, or ions are the same
distance from the same number and type of neighbours; that is, the
regularity of the crystalline lattice creates local environments that
are the same.
Thus the intermolecular forces holding the solid together
are uniform, and the same amount of thermal energy is needed to break
every interaction simultaneously.