Which has greater ionization energy beryllium or boron?
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Explanation:
Boron: 1s2 2s2 2p1
Beryllium: 1s2 2s2
According to periodic trends, boron should have a higher ionization energy but because its valence electron (2p1) is shielded by the 2s electrons, less energy is required to remove the 2p electron(s) from a boron atom than is requried to remove the 2s electron from a beryllium atom.
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