| A | B |
|---|
| maleable | can be pounded flat |
| ductile | can be stretched into wires |
| conductor | good material for electricity and heat to move through |
| metals | conductors, malleable, ductile |
| brittle | breaks rather than bends |
| doesn't move electricity or heat | non-conductor or insulator |
| dull, non conductors, brittle | non metals as solids |
| react with water--burn or explode | alkali metals |
| combine with alkali metals to make salts | halogens |
| tend not to bind with other elements | noble gasses |
| smallest element | hydrogen |
| sometimes conduct electricity | metaloids |
| smallest part of atom | electron |
| part of atom with positive charge | proton |
| tells you how many protons in an atom | atomic number |
| tells you sum of protons and neutron in an atom | atomic mass or weight |
| atoms that have lost or gained one or more electrons | ions |
| positively charged ions | cations |
| negatively charged ions | anions |
| different form of an element having different numbers of neutrons | isotopes |
| contains protons and neutrons | nucleus |
| outermost shell of electrons | valence electrons |
| bond where electrons are shared | covalent bonds |
| bond of cations to anions | ionic bond |
| tend to form ionic bonds | metal to non-metal |
| tend to form metallic bonds | metal to metal |
| One compound breaks down to form 2 compouonds | decomposition reaction |
| two compounds combine to form one | double replacement reaction |
| Reaction in which the reactants include carbon compounds and oxygen and products include carbon dioxide | combustion reaction |
| example of a semiconductor | silicon |
