The arrangement of the electrons in an atom
1 mark · EasyState what the atomic number of an element represents.
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The number of protons in an atom of the element.
Also accept: It is the number of protons in the nucleus of the atom.; Number of protons.
Common mistakes: Number of electrons (this is only true for a neutral atom).
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B1 · 1 mark · States atomic number is number of protons.
Worked solution
The atomic number of an element is the number of protons in an atom of that element.