<span>c.
reactivity
this is a physical property depends on how reactive something is</span>
-they are inside the nucleus of an atom
- they have a relative charge of +1
- they have a relative mass of 1
Your question looks a bit incomplete as you have the same contents in options a) and d). According to your list, I can't see the correct answer, but I can give you one.The difference between the potential energy of the products of the potential energy of the reactants is equal to the enthalpy of the reaction.
