BRAINCAKEAtomic Number and Mass Number
The atomic number is the number of protons in the nucleus. It indicates the amount of positive charge in the nucleus and is unique for every element. An atom is electrically neutral because the number of protons is equal to number of electrons
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More in Atomic Structure
- Discovery of Atomic Structure
- Structure of the Atom
- Isotopes
- Relative Isotopic Mass
- Relative Atomic Mass
- Mass Spectrometer
- Relative Atomic Mass from a Mass Spectrometer
- Relative Molecular Mass from a Mass Spectrometer
All 19 lessons in Atomic Structure · All Edexcel AS-level Chemistry topics