Electrons Notes

  Electrons Electrons orbit themuleus in shells, andeach whell canonlyhold a certain amount - - , The first shell can only hold 2 elections, but all after than can hold 8. of Electrons. up toaping ( The inner shell has the weakest energy, and as the shells get Smother away they Spring the nucleus they have more energy - Therefore the conter shill will have the electronigner 1 masteroary. (He * Na Helium Carbon Sodium Calium Protons 2 6 11 20 Neutrom 2 6 12 20 Electrons 2 6 11 20 AtomicMass 4 12 23 40 Elements in the some group (row),have the same number of shells, and therefore have similar properties Elements in the same period (column) have thesame number of electrons in their outer shells, meaning they lose et /gain electrons similarly when creating an conic bond, and become more reactive as you godern the table This is because they these want to get rid of electrons Suother from the nucleus more