Which Element Has The Smallest First Ionization Energy in How To

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Which Element Has The Smallest First Ionization Energy. The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Please also consult the url provided for an.

13 Which element has the smallest first ionization energy
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A) rb b) mg c) i d) as e) f select the element with the greatest metallic character. The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Potassium (option c) has the smallest first ionization energy from the given elements.

13 Which element has the smallest first ionization energy

The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Bromine is a halogen (so it's on the far right of the table) and it's fairly high up, so its ionization energy is much too high. It is because of the shielding effect that the ionization energy decreases from top to bottom within a group. The element with the lowest ionization energy is cesium (cs).