What happens to the atomic radius when an electron is lost?A.The positive ionic radius is the same size as the neutral atomic radius.B.The positive ionic radius does not follow a trend with the neutral radius.C.The positive ionic radius is larger than the neutral atomic radius.D.The positive ionic radius is smaller than the neutral atomic radius.
Question
What happens to the atomic radius when an electron is lost?A.The positive ionic radius is the same size as the neutral atomic radius.B.The positive ionic radius does not follow a trend with the neutral radius.C.The positive ionic radius is larger than the neutral atomic radius.D.The positive ionic radius is smaller than the neutral atomic radius.
Solution
D. The positive ionic radius is smaller than the neutral atomic radius.
Here's why:
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An atom consists of a nucleus, which contains protons and neutrons, and electrons that orbit the nucleus in different energy levels.
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The atomic radius is the distance from the nucleus to the outermost energy level where the valence electrons are located.
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When an atom loses an electron, it becomes a positive ion (or cation). This is because it now has more protons (which are positively charged) than electrons (which are negatively charged).
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The loss of an electron also means that there is less electron-electron repulsion in the atom. This allows the protons in the nucleus to pull the remaining electrons closer.
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As a result, the radius of the positive ion is smaller than the radius of the neutral atom.
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When an atom loses an electron, it becomes a
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