The value of A for an atom containing 29 protons,29 electrons,and 34 neutrons is
A)5.
B)29.
C)34.
D)58.
E)63.

Name: The value of A for an atom containing 29 protons,29 electrons,and 34 neutrons is A)5. B)29. C)34. D)58. E)63.
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Question

Quizplus · Accepted Answer

The value of A, which is the atomic mass, is the sum of the number of protons and neutrons in the nucleus of an atom. Therefore, A = 29 + 34 = 63. The number of electrons does not contribute to the atomic mass as they are found in the electron cloud outside the nucleus.

The Value of a for an Atom Containing 29 Protons,29