An atorn has 9 electrons and 9 protons at the start. If it loses 2 electrons, the net charge on the atom will be. If the atom instead

gains 4 electrons, the net charge will be

If it loses 2 electrons, the net charge on the atom will be 2+

If the atom instead gains 4 electrons, the net charge will be 4-

Explanation:

It is based on adding and subtracting charges. Protons are + 1 and electrons are - 1

If the atom has 9 protons and 9 electrons, the net charge is + 9 + (-9) = 0. The + 9 is the 9 protons and the - 9 is from the 9 electrons.

If two electrons are taken away, there would be 9-2 or 7 electrons with 9 protons. The net charge would then be + 9 + (-7) = + 2. + 9 comes from the 9 electrons and - 7 is from the 7 electrons.

So, if two electrons are taken away, the net charge is + 2.

Similarly, if the atom gains 4 electrons, there will be 9+4 or 12 electrons and 9 protons. The net charge would then be + 9 + (-12) = - 4. + 9 comes from the 9 protons and - 12 comes from the 12 electrons.

So, if 4 electrons are added, the net charge is - 4.