K has lower ionization potential than Na?

[johnwandering]

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Im confused by this tidbit from Br.

It is clearly indicated that K has lower ionization E than Na, and it should be much easier to ionize.
Why does thismean K has a lower ionization potential?

Did they mean ionization energy?

 

[MedPR]

Correct me if I'm wrong, but ionization potential just means "the ability (potential) to be ionized."

 

[Dasypus]

Ionization energy and ionization potential are the same thing by (slightly) different names. If it's measured in kJ/mol, it's usually refered to as ionization energy, and if it's measured in eV, it's refered to as ionization potential; but in each case it's measuring the same thing, and the numbers are interconvertable.