Reactant concentration, the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.
I think the number of protons in the nucleus the number of valence electrons atomic mass...
Answer:
The cards (matter) can be rearranged constantly, placed with others, the total or resent amount remains constant.
Explanation:
By atomic radius, the bottom left
Affects populations,
Occurs when there is genetic variation
Selects organisms with certain traits to survive.
