BRAINCAKEAtomic Number and Mass Number
The atomic number is the number of protons in the nucleus. The overall charge of an atom is zero. This is because an atom has the same number of electrons as protons.
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More in Atomic Structure
- Discovery of the Atom
- Structure of the Atom
- Relative Mass and Relative Charge
- Isotopes
- Isotopes of Carbon
- Electrons
- Electron Shells
- The Mass Spectrometer
All 22 lessons in Atomic Structure · All AQA AS-level Chemistry topics