What do we mean by #"ionization energy?"#

Answer 1

See here....

And here.

And #"ionization energy"# is STRICTLY defined as the energy required to produce one mole of gaseous cations, and one mole of gaseous electrons from one mole of gasesous element...

#"Element(g)"+Delta rarr"{elemental cation}(g)"^(+) + e^(-)(g)#

#Delta="ionization energy"#

As explained in the links, ionization INCREASES across a Period from left to right as we face the Table, and DECREASES down a Group.....

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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.

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