Essential Chemistry for IGCSE - Atoms, Elements And Compounds (Section 2 - No. 9)
What is the electron configuration of an atom determined by?
The number of neutrons in the nucleus.
The total number of protons and neutrons.
The atomic number of the atom.
The mass number of the atom.
Explanation
The number of electrons (and therefore the electron configuration) is determined by the atomic number (number of protons) in a neutral atom.
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