Electrons: negative
Protons: positive
Neutrons: nuetral
<span>increase while moving left to right within a period and increase while moving upward within a group. </span>
Answer:
it states that the total mass of the products are the same as the total mass of the reactants in a chemical reaction.
Explanation:
Answer:
The atomic mass number is the number of protons and neutrons in an atom.
