Question

Which has greater ionization energy beryllium or boron?

Answer 1

Answer:

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.