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What trend does the first ionization energy follow, going down the periodic table?A.The first ionization energy increases because there are more protons in the nucleus.B.The first ionization energy decreases because the outermost electron is farther from the nucleus.C.The first ionization energy decreases because atoms get smaller.D.The first ionization energy increases because there are more electrons in the atom.SUBMITarrow_backPREVIOUS

Question

What trend does the first ionization energy follow, going down the periodic table?A.The first ionization energy increases because there are more protons in the nucleus.B.The first ionization energy decreases because the outermost electron is farther from the nucleus.C.The first ionization energy decreases because atoms get smaller.D.The first ionization energy increases because there are more electrons in the atom.SUBMITarrow_backPREVIOUS

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Solution

The first ionization energy decreases as you go down the periodic table. This is because the outermost electron is farther from the nucleus and is therefore less tightly bound to the atom. This makes it easier to remove, thus lowering the ionization energy. So, the correct answer is B. The first ionization energy decreases because the outermost electron is farther from the nucleus.

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