Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

Covalent network solids typically have high melting points and boiling points.

The chemical formula of a network solid indicates in the molecule by a a formula unit.

Covalent-network solid is a chemical compound (or element) in which the atoms are bonded by covalent bonds in a continuous network extending throughout the material.  

For example, SiO₂ is a covalent-network solid.

Silicon Dioxide has a high melting point, around 1700°C.

Silicon(IV) oxide has continuous three-dimensional network of SiO₂ units.

Both high and the ratio number of atoms

Explanation:

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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