Problem: The first ionization energies of the elements __________ as you go from left to right across a period of the periodic table, and __________ as you go from the bottom to the top of a group in the table.A) increase, increaseB) increase, decreaseC) decrease, increaseD) decrease, decreaseE) are completely unpredictable

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Establish the definition of ionization energy and determine the proper words for the blank statements

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:

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Problem Details

The first ionization energies of the elements __________ as you go from left to right across a period of the periodic table, and __________ as you go from the bottom to the top of a group in the table.

A) increase, increase

B) increase, decrease

C) decrease, increase

D) decrease, decrease

E) are completely unpredictable

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