Essential Chemistry for IGCSE - Atoms, Elements And Compounds (Section 3 - No. 31)
How does the number of protons in an atom relate to its atomic number?
The atomic number is the sum of the number of protons and neutrons.
The atomic number is the number of protons in the nucleus.
The atomic number is the number of electrons in the atom.
The number of protons is always twice the atomic number.
Explanation
The atomic number is defined as the number of protons in the nucleus.
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