Electron, because they’re about 1/2000 the mass of a proton or nuetron
1. C
2. E
3. A
4. B
5. D
I hope that helps <3
A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds.