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Predict, the blok , Period group to which element
belongs to sedium Na (2-11)​

By Parker

Predict, the blok , Period group to which element
belongs to sedium Na (2-11)​

About the author
Parker

if 3a + 2b = 23 and ab = 20 , find 9a^2 + 4b^ 2 (using identities)​

Which is the additive identity of
whole numbers?
a) 0
b)-1
c) 1​

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