Cody

Week 1, Day 1 April 13, 2009 Last week we learned about what an atom consists of. The atom must have the same number of protons as electrons. You can find what the number of protons an atom has by checking the atomic number above the symbol of the atom on the periodic table. To find how many neutrons there are in the atom you take the atomic number and subtract the number from the atomic wheight that is found below the symbol of the atom. This week we are learning about what an ion is. Ions are positively or negatively charged atoms that have more protons or less protons than electrons.