Oxygen’s valency can be calculated similarly by subtracting the number of electrons needed to complete the octet (six electrons) from eight.
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Oxygen’s valency can be calculated similarly by subtracting the number of electrons needed to complete the octet (six electrons) from eight.
This method applies by considering oxygen’s position in the periodic table, with 6 valence electrons. Subtracting this from the octet rule (8) yields its valency of 2.