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Doing some homework, are my answers right?

HCN= Polar
HCOOH= Polar
H2CCCH2= Nonpolar

Out of the following elements: Na, H, and Au order them least to greatest in the following:

Eletronegativity= Na is smallest, H is second, Au is largest

Ionization Energy= Na is smallest, Au is second, H is largest

Atomic Radius= H is smallest, Au is second, Na is largest.

Thanks for checking, please tell me if I got any wrong!

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