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Multiple Choice
Which element has 31 protons in its nucleus?
A
Gallium (Ga)
B
Germanium (Ge)
C
Arsenic (As)
D
Zinc (Zn)
Verified step by step guidance
1
Recall that the number of protons in the nucleus of an atom defines the atomic number of an element.
Identify the atomic number associated with each element given in the options: Gallium (Ga), Germanium (Ge), Arsenic (As), and Zinc (Zn).
Use the periodic table to find the atomic number for each element. For example, Gallium has an atomic number of 31, Germanium is 32, Arsenic is 33, and Zinc is 30.
Match the atomic number 31 to the element with that number of protons.
Conclude that the element with 31 protons in its nucleus is the one with atomic number 31, which is Gallium (Ga).