Problem: What is the general trend in first ionization energy as you move across a row in the periodic table?

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We’re being asked the general trend in first ionization energy as you move across a row in the periodic table.


Ionization energy (I. E.) is the energy required to remove an electron from a gaseous atom or ion.

First I.E.corresponds to removing the first valence electron from a neutral atom

Second I.E.refers to removing a second electron

Third I.E.refers to removing the third electron

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What is the general trend in first ionization energy as you move across a row in the periodic table?

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