Will upvote!
chemical processes store and release in the bonds of molecules.
a: mass
b: matter
c: energy
d: atoms

Answer is: C: energy.

For example, balanced chemical reaction: 2Mg(s) + O₂(g) → 2MgO(s) + energy.

This is chemical process (chemical reaction), because new substance (magnesium oxide MgO) is formed, the atoms are rearranged and the reaction is followed by an energy change (exothermic reaction because energy is released).

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.