Acrystalline solid has a high melting point and is known to be held together with covalent bonds. this solid is an example of

a. a network covalent solid
b. an ionic solid
c. a metallic solid
d. a molecular solid

3

explanation:

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

the volume increases