| A | B |
|---|
| atom | the smallest form of matter |
| proton | the positive part of the atom in the nucleus |
| nucleus | the positive center of the atom |
| neutron | neutral part of the atom in the nucleus |
| electron | negative part of the atom moving around the nucleus |
| electron clouds | where the electrons are found in their orbitals |
| atomic number | the number of protons in an atom |
| elements | the different atoms that have different properites |
| carbon | element with 6 protons that is in all living organisms |
| metals | found on the left side of the periodic table |
| periodic table | chart that organizes all the elements by their properties |
| valance electrons | the outer most electrons that allow atoms to bond together |
| non-metals | found on the right side of the periodic table |
| semi-conductors | next to the zig-zag line. they have properties of both metals and non-metals |
| intert (noble) gases | last group in the periodic table that has 8 valence electrons that don't like to bond with other atoms |
| group | cloumn going up and down that have same number of vlance electrons |
| period | a row elements are organized by the number of electron energy levels |
| properties of metals | shiny, good conductors, ductile, high melting point |
| properties of non-metals | dyll, bad conductors, low melting point, most are gases |
