1- The element sodium has an atomic number of 11 and a mass number of 12.
How many protons does sodium have?

Answer and Explanation:

Sodium has 11 protons.

To know how many protons are in an element on the periodic table, all you have to do is look at the atomic number. The atomic number is the same as the amount of protons.

The amount of protons defines the element, which is why it appears on the element description as the atomic number.

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