Multiple Choice
Which element has 24 protons in its nucleus?
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4. Atoms and Elements
Periodic Table: Element Symbols
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Which element has an atomic number of (i.e., protons in its nucleus)?
A
Lead (Pb)
B
Gold (Au)
C
Mercury (Hg)
D
Platinum (Pt)
Verified step by step guidance1
Understand that the atomic number of an element represents the number of protons in the nucleus of its atoms.
Recall that each element on the periodic table is uniquely identified by its atomic number, not by its atomic mass or symbol alone.
Look up the element with atomic number 80 on the periodic table, which corresponds to the number of protons in the nucleus.
Identify the element symbol and name associated with atomic number 80; this element is Mercury, symbolized as Hg.
Confirm that the other options (Lead, Gold, Platinum) have different atomic numbers: Lead (82), Gold (79), and Platinum (78), so they do not match atomic number 80.
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