Question

a single atom of an element has 11 protons, 11 electrons, and 12 neutrons. which element is it?
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na
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se

Explanation:

Step1: Determine element by proton number

The atomic number of an element is equal to the number of protons. Here the number of protons is 11.

Step2: Find element corresponding to atomic number

The element with atomic number 11 is sodium, symbol - Na.

Answer:

Na