Essential Chemistry for IGCSE - Structure And Bonding (Section 4 - No. 23)
What does the term 'valence' refer to?
The number of protons in an atom.
The number of electrons in the first shell.
The number of electrons in the outer shell.
The number of neutrons in the nucleus.
Explanation
Valence refers to the number of electrons in the outer shell, also known as valence electrons.
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