Protons, Neutrons & Electrons Flashcards

All 4 cards in this deck

What are the relative mass and relative charge of a proton?

Relative mass 1, relative charge $+1$.

What are the relative mass and relative charge of a neutron?

Relative mass 1, relative charge 0.

Why is an atom electrically neutral?

It has equal numbers of protons and electrons, so the $+1$ and $-1$ charges cancel.

True or false? An electron and a proton have equal but opposite charges, and equal masses.

False. Their charges are equal and opposite ($-1$ and $+1$), but an electron has far less mass than a proton.