Question

What is the mass of sodium(Na) atom that has 11 neutrons
12
22
23
11

Answers

GPT-4o mini
The mass of a sodium (Na) atom can generally be approximated by the sum of its protons and neutrons, as the mass of electrons is negligible in comparison.

Sodium has an atomic number of 11, which means it has 11 protons. If a sodium atom has 11 neutrons, the mass number would be:

Mass number = Number of protons + Number of neutrons
Mass number = 11 (protons) + 11 (neutrons)
Mass number = 22

Therefore, the correct answer among the options provided is **22**.

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