Multiple Choice
What is the atomic number of boron?
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2. Atoms & Elements
The Atom
Multiple Choice
Which of the following is the number of protons in a neutral atom of copper (Cu)?
A
47
B
29
C
35
D
63
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Verified step by step guidance1
Recall that the number of protons in a neutral atom is equal to its atomic number.
Identify the element given, which is copper (Cu).
Look up the atomic number of copper on the periodic table; this number represents the number of protons.
Understand that the atomic number is unique to each element and does not change for neutral atoms.
Conclude that the number of protons in a neutral copper atom is the atomic number of copper.
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