Multiple Choice
Which of the following is the correct chemical symbol for carbon?
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2. Atoms & Elements
Periodic Table: Element Symbols
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Which element on the periodic table has 13 protons?
A
Silicon (Si)
B
Magnesium (Mg)
C
Aluminum (Al)
D
Phosphorus (P)
Verified step by step guidance1
Recall that the number of protons in an atom is called the atomic number, which uniquely identifies each element on the periodic table.
Look up the atomic numbers of the given elements: Silicon (Si), Magnesium (Mg), Aluminum (Al), and Phosphorus (P).
Verify the atomic number for each element: Magnesium has 12 protons, Aluminum has 13 protons, Silicon has 14 protons, and Phosphorus has 15 protons.
Identify the element with 13 protons by matching the atomic number to the element name.
Conclude that the element with 13 protons is Aluminum (Al), since its atomic number is 13.
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