True or false? The maximum covalency in 2nd-period elements is #4#. Why is this true if fluorine can only make one bond?
Notice what the "rule" says: the maximum covalency of 2nd-period elements. It doesn't say for all elements in the 2nd period, but rather, when considering each element.
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True. While fluorine can only form one bond due to its high electronegativity, the maximum covalency in 2nd-period elements is 4 because it includes elements like carbon, nitrogen, oxygen, and fluorine. These elements can form multiple bonds and exhibit a maximum covalency of 4 by utilizing their valence electrons in bonding.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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