An atom is ionized so that it has only one electron. When the electron drops from...

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An atom is ionized so that it has only one electron. When the electron drops from...

An atom is ionized so that it has only one electron. When the electron drops from the n = 6 shell to the n = 1 shell, an X-ray of wavelength 72.36 pm is emitted. What is the atomic number?

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