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Which element has the largest atomic number?
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4. Atoms and Elements
Periodic Table: Element Symbols
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Which element has 15 protons in its nucleus?
A
Phosphorus (P)
B
Chlorine (Cl)
C
Silicon (Si)
D
Sulfur (S)
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Recall that the number of protons in the nucleus of an atom defines the element's atomic number.
Identify the atomic number associated with each element given: Phosphorus (P), Chlorine (Cl), Silicon (Si), and Sulfur (S).
Use the periodic table to find the atomic numbers: Phosphorus has atomic number 15, Chlorine 17, Silicon 14, and Sulfur 16.
Match the atomic number 15 to the element, which is Phosphorus (P).
Conclude that the element with 15 protons in its nucleus is Phosphorus.
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