In Calculating the X-Ray Energy Levels the Effective Charge of the Nucleus

question 52

Multiple Choice

In calculating the x-ray energy levels the effective charge of the nucleus is taken to be Z - b, where Z is the atomic number.The parameter b enters because:

• A)an electron is removed from the inner shell
• B)a proton is removed from the nucleus
• C)the quantum mechanical force between two charges is less than the classical force
• D)the nucleus is screened by electrons
• E)the Pauli exclusion principle must be obeyed

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