A) 31
B) 50
C) 74
D) 7
Answer: A
Explanation: Gallium has atomic number 31. That means each gallium atom has 31 protons in its nucleus.
A) 31
B) 50
C) 74
D) 7
Answer: A
Explanation: Gallium has atomic number 31. That means each gallium atom has 31 protons in its nucleus.
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