Cambridge Olevel Chemistry revision notes

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Lesson

Lesson-3.1.2- Define proton number (atomic number) as the number of protons in the nucleus of an atom.

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Lesson-3.1.3- Define nucleon number (mass number) as the total number of protons and neutrons in the nucleus of an atom.Previous Lesson-3.1.1- State the relative charges and approximate relative masses of protons, neutrons and electrons.Next