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What is the difference between #"NI"# and #"Ni"#? How many elements are in each?

Answer 1

Well, for one, #"NI"# doesn't exist (on the other hand, #"NI"_3# has been witnessed; #"PF"_3# exists, so by implication of elements on the same column of the periodic table being similar in valence electronic behavior, #"NF"_3# exists, and thus, so might #"NI"_3#).

Despite both of their (#"N"#, #"I"#) natural oxidation states being negative, the least you could have is charge magnitudes matching, which would require more than one #"I"# atom bonded to #"N"#. If it did exist in this unrealistic exercise, it would be different in that it has two elements.

#"Ni"# is the nickel atom, and clearly, there is only one element in one atom, because every atom derives from a single element (a neutral atom IS the element).

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Answer 2

Peyton Adams

The chemical symbol for nickel is "Ni", and it denotes one of the 28 elements that make up nickel.

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Answer from HIX Tutor

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.