Problem: Rank these elements according to first ionization energy. 

FREE Expert Solution

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

The trend of the ionization energies of the elements can be observed in the periodic table:

increases going from left to right of a period

decreases going down a group

Given elements:        K, Ca, Ga, Ge, As, Se, Br and Kr

Let’s check their location in the periodic table and see how they fall in the trend mentioned.

  • All of the given elements are on the same period → ionization energy increases going from left to right

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Problem Details

Rank these elements according to first ionization energy. 

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Periodic Trend: Ionization Energy concept. You can view video lessons to learn Periodic Trend: Ionization Energy. Or if you need more Periodic Trend: Ionization Energy practice, you can also practice Periodic Trend: Ionization Energy practice problems.

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Based on our data, we think this problem is relevant for Professor Marin's class at UCF.