Explain the difference between Z (the atomic number) and A (the mass number).

+3 votes

Explain the difference between Z (the atomic number) and A (the mass number).

 

 

The atomic number, Z, is the number of protons in an atom's nucleus. The atomic mass number (A) is the sum of the neutrons and protons in an atom.

The atomic number, Z, is the sum of the neutrons and protons in an atom. The atomic mass number (A) is the number of protons in an atom's nucleus.

 

asked May 7, 2012 in General Chemistry by Joey33 ~Expert~ (1,216 points)
    

1 Answer

+2 votes
 
Best answer

Choice A, is correct:

The atomic number, Z, is the number of protons in an atom's nucleus. The atomic mass number (A) is the sum of the neutrons and protons in an atom.

answered May 7, 2012 by pokemonmaster ~Expert~ (3,856 points)
selected May 7, 2012 by Joey33



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