3 years ago

An atom of sodium has 11 protons, 11 electrons,and 12 neutrons, what is its atomic number and mass number?

1 answer:

3 0

Example: A sodium atom contains 11 protons, so its atomic number is 11. Mass number is the total of the protons and neutrons together, and it is given the symbol A. Example: A sodium atom contains 11 protons and 12 neutrons; its mass number A is 23<span>.</span>

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