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Phosphorus.

Across the period, first ionization energy increases.

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Which element has the highest ionization rate Sodium aluminum calcium or phosphorus?

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Fluorine. Ionization energies are a periodic trend and they generally increase as you go up and to the right in the periodic table.See the chart in the Web Links to the left for a complete chart of the ionization energies of all the elements.


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What is the predicted order of first ionization energies from highest to lowest for aluminum phosphorus silicon and sulfur?

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what element C or N has the highest ionization energy