The answer for the first question is A. Proton is the subatomic particles which adds most of the mass of an atom as well as the neutron since they have the same mass. Photon, on the other hand, is not one of the subatomic particles.
uniquely identifies a chemical element. yupppppp
A catalyst will ALWAYS increase the reaction rate so C
Answer:
depends on how many you have...
Explanation:
She can buy 9 pineapples. I don't know why anyone would need that many pineapples
