| A | B |
|---|
| properties of metals | hard, shiny, solid, good conductors of heat and electricity |
| malleable | can be hammered or rolled into sheets |
| metallic bonding | electrons move freely between many positively charged ions |
| how metallic bonding works | the ions are in layers that slide past each other |
| metal groups on the periodic table | groups 1-12 (doesn't include hydrogen) |
| alkali metals | the metals in group 1 on the periodic table |
| alkaline metals | the metals in group 2 on the periodic table |
| are found in nature only in compounds | group 1 and 2 metals |
| radioactive element | an element that breaks down and gives off particles of energy |
| so reactive they are not found free in nature | alkaline metals |
| barium compound | a radioactive compound that can absorb x-rays |
| transition elements | elements in groups 3 - 12 |
| elements less reactive than those in groups 1 - 2 | transition elements |
| toxic | reason cadmium and cobalt are not used for paints |
| the iron triad | iron, cobalt, nickel |
| the only magnetic metals | the iron triad |
| alumanium | most abundant element in the earth's crust |
| iron | the second most abundant element in the earth's crust |
| coinage metals | copper, silver, gold |
| metals so unreactive they are found as elements in nature | coinage metals |
| mercury | liquid metal used in thermostats, switches, batteries |
| mining | digging metals out of the earth's crust |
| ore | a metal compound mixed with clay or rock |
| alloy | a mixture of a metal and one or more other elements |
