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12. An atom with an atomic number of 34, and a mass number of 79 has:
protons
neutrons
electrons
b. 45 Protons, 45 Neutrons, 34 Electrons
a. 34 Protons, 45 Neutrons, 34 Electrons
c. 45 Protons, 34 Neutrons, 34 Electrons

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Answer:

Answer is A.

Explanation:

atomic number is number of protons.

atomic mass is protons + neutrons

and electrons = number of protons

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