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Which of the following is the symbol for the element located in group 4A (14) and period 2 of the periodic table?
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2. Atoms & Elements
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Scelta multipla
Which of the following is the number of protons in a gallium (Ga) atom?
A
74
B
13
C
31
D
30
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Guida verificata passo dopo passo1
Recall that the number of protons in an atom is given by its atomic number, which is unique to each element.
Identify the element in question: gallium (Ga).
Look up the atomic number of gallium on the periodic table; this number represents the number of protons in a gallium atom.
Note that the atomic number of gallium is 31, meaning a gallium atom has 31 protons.
Understand that the other numbers given (74, 13, 30) do not correspond to gallium's atomic number and thus are incorrect for the number of protons.
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