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Just a quick question to be sure:

I want to calculate the electronegativity difference of [itex]Na_{2}O,\ \Delta X_{Na_{2}O}[/itex],

Is this correct:

[itex]\Delta X_{Na_{2}O}=X_{O}-X_{Na}[/itex]

Or is it:

[itex]\Delta X_{Na_{2}O}=X_{O}-2*X_{Na}[/itex] (since there are 2 Na atoms).

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# Calculating electronegativity differences

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