If an atom has a mass number of 23, which of the following is always true?
A. The atom has an odd number of neutrons.
B. The number of protons in the nucleus does not equal the number of neutrons.
C. The atomic number is less than 11.
D. The atom is not an isotope.

Question

If an atom has a mass number of 23, which of the following is always true?
  A. The atom has an odd number of neutrons. 	
  B. The number of protons in the nucleus does not equal the number of neutrons. 	
  C. The atomic number is less than 11. 	
  D. The atom is not an isotope.

hayhayz · Answer

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fortytherapper · Answer

When looking at mass number, I would look up what makes a mass number. It's two things that do