<em>Noun </em>
a substance that takes part in and undergoes change during a reaction.
2. Oxygen because it has more mass
The number of protons = atomic number in Periodic table, so 35
The number of neutrons = mass number - number of protons = 79-35=44
The number of electrons = atomic number - 1 = 35-1 =34
Answer:
35.453 good luck with your work
