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Which of the following is the atomic number of chlorine?
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2. Atoms & Elements
Periodic Table: Element Symbols
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Which element on the periodic table has 79 protons?
A
Mercury (Hg)
B
Platinum (Pt)
C
Silver (Ag)
D
Gold (Au)
Guida verificata passo dopo passo1
Recall that the number of protons in an atom is called its atomic number, which uniquely identifies each element on the periodic table.
Look up the atomic numbers of the given elements: Mercury (Hg), Platinum (Pt), Silver (Ag), and Gold (Au).
Mercury (Hg) has an atomic number of 80, Platinum (Pt) has 78, Silver (Ag) has 47, and Gold (Au) has 79.
Since the element with 79 protons corresponds to the atomic number 79, identify which element matches this number.
Conclude that the element with 79 protons is Gold (Au), as it has the atomic number 79.
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