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.

the answers would be

the first one and the second one

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