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4. In general, what does a subscript (such as the “2" in H2) tell you about the molecule?

The number of atoms in the molecule.

Explanation:

your answers are a,b,,e and f

i hope this

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.