| A | B |
|---|
| metals | shiny, hard solids |
| malleable | means metals can be hammered or rolled into sheets |
| ductile | means metals can be drawn into wires |
| metallic bonding | positively charged metallic ions are surrounded by a "sea of electrons" |
| alkali metals | Group 1 of the periodic table |
| francium | last element in Group 1; extremely rare and radioactive |
| radioactive element | breaks down and gives off particles and energy |
| alkaline metals | has 2 electrons in outer energy level |
| transition elements | Groups 3-12 |
| iron cobalt nickel | iron triad |
| iron triad | only elements known to create a magnetic field |
| nickel | added to metals to give them strength |
| coinage metals | copper silver gold |
| zinc cadmium mercury | Group 12 |
| mercury | liquid metal |
| transuranium elements | elements having more than 92 protons |
| ten | number of synthetic elements found in the actinide series |
| americium | element used in some smoke detectors |
| plutonium | used in nuclear reactors and bombs |
| gases | most nonmetals are _______ at room temperature |
| one | _____ nonmetal is a liquid |
| hydrogen | has 1 electron |
| salt former | halogen means _________________ |
| halogen | can be very reactive diatomic molecules in gaseous state |
| bromine | only nonmetal that is liquid at room temperature |
| sublimation | process of a solid changing directly to a vapor without forming a liquid |
| metalliod | conduct electricity better than nonmetals but not as good as some metals |
| aluminum | the most abundant metal in Earth's crust |
| boron | metalloid used for borax and boric acid |
| allotropes | different forms of the same element having different molecular structures |
| graphite | black powder that is an excellent lubricant |
| diamond | clear and extremely hard |
| oxygen | makes up 20% of air |
