Magnesium

 Magnesium has an atomic number of 12. Which of the following statements is true of a neutral magnesium atom?

a. It has 12 protons, 12 electrons, and 12 neutrons.

b.  It has 12 protons, 12 electrons, and six neutrons.

c. It has six protons, six electrons, and no neutrons.

d. It has six protons, six electrons, and six neutrons.

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