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In Bohr's theory, the electron with the greatest kinetic energy is found in:

1. the first shell of a hydrogen atom
2. the first shell of a He+ ion
3. the second shell of a He+ ion
4. the second shell of a Li2+ ion

Correct answer: the first shell of a He+ ion

Solution

According to Bohr's theory, the electron with the greatest kinetic energy is found in the first shell of a He+ ion, as it has the highest velocity due to the strong nuclear attraction.

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