PDF chapter test TRY NOW
Neutral | Hydrogen | Proton |
Subatomic particles | Valency | Number of protons |
Negative | Electron | Mass number |
Atom | Nucleus | Empty space |
1. The subatomic particle revolve around the nucleus is .
2. is the sum of protons and neutrons.
3. The basic unit of matter is .
Register for free to see more content