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Question

Atomic number is the number of ___ in an atom


A

protons

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B

neutrons

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C

electrons

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D

alpha particles

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Solution

The correct option is A

protons


Atomic number is the number of protons in an atom. The number of electrons is only equal to the atomic number in an uncharged atom. In a charged atom, this value changes!

Hence, the only valid answer would be protons here.


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