BRAINCAKEIsotopes
Isotopes are atoms of the same element with the same number of protons and different number of neutrons
Hydrogen has three isotopes: hydrogen-1 (1 proton, 0 neutrons), hydrogen-2 or deuterium (1 proton, 1 neutron) and hydrogen-3 or tritium (1 proton, 2 neutrons). They all have the same atomic number but different mass numbers.
Sign in free to see the rest of this lesson, the R.E.C.I.P.E. recall steps and the quiz
BrainCake is free. Make an account in seconds and pick up where this page stops.
Key terms in this lesson
- atomic number
- The number of protons in the nucleus of an atom, unique to each element.
- mass number
- The total number of protons and neutrons in the nucleus of an atom.
More in Atomic Structure
- Discovery of Atomic Structure
- Structure of the Atom
- Atomic Number and Mass Number
- 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