Multiple Choice
Which of the following element symbols represents the element with atomic number 12 on the periodic table?
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2. Atoms & Elements
Periodic Table: Element Symbols
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Which of the following element symbols represents the element with atomic number 12 among the first 20 elements of the periodic table?
A
Al
B
Mn
C
Mg
D
Na
Verified step by step guidance1
Recall that the atomic number of an element corresponds to the number of protons in its nucleus and uniquely identifies the element on the periodic table.
Identify the atomic numbers of the given element symbols: Al (Aluminum), Mn (Manganese), Mg (Magnesium), and Na (Sodium).
Check the periodic table or memorize that Magnesium (Mg) has the atomic number 12.
Confirm that the problem asks for the element with atomic number 12 among the first 20 elements, which includes Mg.
Conclude that the element symbol representing atomic number 12 is Mg.
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