How many molecules are in 15.0 g of silicon tetrafluoride?

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.

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.

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