What group of elements generally have the lowest second ionization energy?

2 answers:

7 0

Hey there,
<span>The ionization energy decreases from top to bottom in groups, and increases from left to right across a period.</span>
Helium<span> has the largest first ionization energy, while </span>francium<span> has one of the lowest.
</span>
Hope this helps :))

~Top

ICE Princess25 [194]3 years ago

4 0

<span>By definition, the first ionization energy is the energy required to remove the most loosely held electron from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+. </span><span />

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4) Carbon dioxide: CO2. This is also known as carbon anhydride. The number 2 to the right of O is a subscript.

5) Water: H2O. The number 2 to the right of H is a subscript.

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