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OpenStudy (anonymous):
If an atom of lithium has 3 protons, 3 electrons, and 4 neutrons then what is its atomic mass number? A. 3 B. 4 C. 7 D. 10
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OpenStudy (anonymous):
The mass number (A), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus.
OpenStudy (anonymous):
\[3+4=?\]
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