How many protons, electrons, and neutrons does the Mg+2 ion have?

The Mg+2 ion is a magnesium ion that has lost two electrons.

1. Protons: The number of protons in an atom or ion is determined by its atomic number. For magnesium, the atomic number is 12, so it has 12 protons.

2. Electrons: In a neutral atom, the number of electrons equals the number of protons. However, the Mg+2 ion has lost two electrons, so it has 10 electrons (12 original electrons - 2 lost electrons = 10 electrons).

3. Neutrons: The number of neutrons in an atom or ion can be found by subtracting the atomic number from the atomic mass number. The atomic mass number of magnesium is approximately 24, so it has about 12 neutrons (24 atomic mass number - 12 atomic number = 12 neutrons).

So, the Mg+2 ion has 12 protons, 10 electrons, and 12 neutrons.