David observed properties of four different compounds,
only one of which is an ionic compound. His observations
are shown in the chart.
Compound
| Observations
W
Is a hard solid, melts
at 44° C, has a
molecular structure
Is a brittle solid, does
not conduct
electricity in water,
has a crystal
structure
Is a hard solid,
conducts electricity,
has a molecular
structure
Is a brittle solid,
melts at 801° C. has
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