Multiple Choice
In a simplified model of the atom, which subatomic particle is typically considered the smallest?
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4. Atoms and Elements
Subatomic Particles (Simplified)
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Which element has 17 protons in its nucleus (atomic number 17)?
A
Sulfur (S)
B
Potassium (K)
C
Argon (Ar)
D
Chlorine (Cl)
Verified step by step guidance1
Recall that the atomic number of an element is equal to the number of protons in its nucleus.
Identify the atomic number given in the problem, which is 17 protons.
Use the periodic table to find the element with atomic number 17.
Look for the element symbol and name corresponding to atomic number 17; this element is Chlorine (Cl).
Confirm that the other options (Sulfur, Potassium, Argon) have different atomic numbers: Sulfur (16), Potassium (19), Argon (18).
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