4. The following element contains 12 protons and a mass number of 24. Which of the following statements is NOT correct about it? * O It contains 24 neutrons O It contains 12 electrons O Its atomic number is 12 O its contains 24 nucleons.

It contains 24 neutrons.

Explanation:

Mass number = Protons + Neutrons

If you were to have 24 neutrons, the mass number would be 36, invalidating the known information. You have 12 protons and 12 neutrons to form a mass number of 24. Remember that your protons are the same thing as the atomic number, so you can make an equation using your known information to derive true statements.

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