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Ipatiy [6.2K]
2 years ago
7

Please help !!!

Chemistry
1 answer:
vivado [14]2 years ago
3 0
Answer: 12 neutrons
Explanation: The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass). Sodium has a mass number of 23amu. Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.
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calculation

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Read 2 more answers
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