Multiple Choice
In the simplified model of subatomic particles, the positively charged particle in an atom is the:
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4. Atoms and Elements
Subatomic Particles (Simplified)
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In a simplified model of subatomic particles, the mass number of an atom is determined by which of the following?
A
The number of neutrons only
B
The total number of protons and neutrons in the nucleus
C
The number of electrons only
D
The total number of protons and electrons in the atom
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