Which Element Has The Smallest Ionization Energy?

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Anonymous Profile
Anonymous answered
Francium
Anonymous Profile
Anonymous answered
But shouldn't Francium be the smallest? It's below Cesium
Sibyl Zoe Profile
Sibyl Zoe answered
According to my knowledge, all the alkaline earth elements have the smallest Ionization energy. These include Li, Na and K.
Vincent Davis Profile
Vincent Davis answered
As indicated in the image attached, the lowest Ionization energy's are those of the Alkali Earth metals of Group IA of the Periodic Table of the Elements. Please also consult the URL provided for an explanation of Ionization energies of the Periodic Table.

images.google.com
Anonymous Profile
Anonymous answered
According to Mastering Chemistry it's Cs, don't know why though according to the trends.
Anonymous Profile
Anonymous answered
In the periodic table the the ionization energy increases from left to right and decreases while moving down. According to this cesium
is found of the bottom left corner of periodic table so it has the smallest ionization energy.

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