Multiple Choice
An atom has 13 protons, 14 neutrons, and 13 electrons. Which element is it?
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4. Atoms and Elements
Subatomic Particles (Simplified)
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Which element has 49 protons in its nucleus?
A
Indium (In)
B
Gallium (Ga)
C
Tin (Sn)
D
Antimony (Sb)
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