Multiple Choice
Which set correctly lists the three major subatomic particles found in atoms (in a simplified model)?
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4. Atoms and Elements
Subatomic Particles (Simplified)
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How many protons are in an atom of bismuth (Bi)?
A
83
B
126
C
82
D
209
Verified step by step guidance1
Identify the element in question, which is bismuth (Bi). Each element is defined by its atomic number, which represents the number of protons in its nucleus.
Recall that the atomic number is unique to each element and can be found on the periodic table next to the element's symbol.
Look up bismuth (Bi) on the periodic table to find its atomic number. This number directly tells you how many protons are in one atom of bismuth.
Understand that the number of protons is always equal to the atomic number, regardless of the isotope or atomic mass.
Conclude that the number of protons in bismuth is the atomic number you found, which corresponds to one of the answer choices.
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