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Q: A common isotope of carbon has a mass number of 13. The total number of protons and neutrons in the nucleus is - A. 19. B. 13. C. 12. D. 6.
A: The mass number, often represented by the symbol A, is the total number of neutrons and protons in the nucleus of an atom.
ghelee|Points 194|
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Asked 7/11/2012 11:58:28 AM
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Bohr recognized that the electrons in the shells surrounding the nucleus were able to move to different energy levels. If an electron ________ enough energy it would jump to a higher energy level. A. created B. emitted C. absorbed D. transferred
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Updated 5/18/2016 11:55:25 AM
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Bohr recognized that the electrons in the shells surrounding the nucleus were able to move to different energy levels. If an electron absorbed enough energy it would jump to a higher energy level.

Added 5/18/2016 11:55:25 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [5/18/2016 12:07:55 PM]
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