Please join us the 2016-2017 Open House for PreK - 12th grades on Wednesday, August 17 from 6 p.m. - 7 p.m. Class schedules for grades 6th - 12th are now available to be picked up in the front office from 8 a.m. - 4 p.m. There is a new Friday Dismissal time of 3:00 p.m. this year.
1 Electrons-Subatomic particle that has almost no weight and carries a negative charge; orbits in a shell about the nucleus of an atom. 2  Neutrons-Subatomic particle that has a weight of one atomic mass unit, carries no charge, and is found in the nucleus of an atom.
Mg has 12 protons in its nucleus - these are positively charged Surrounding the nucleus are 12 negatively charged electrons. Because the number of positive charges matches the negative charges, the atom is overall neutral The neutral atom can lose 2 electrons from its outer shell. This leaves 12 positively charged protons, and only 10 negative charged electrons The magnesium ion has 10 electrons and a charge of 2+ . The Mg atom - like all atoms - does not lose protons from the nucleus, in the chemistry that you are studying. It can only lose or gain electrons.