| A | B |
|---|
| group | vertical column of periodic table |
| metal | elements - shiny, malleable, ductile, good conductors of heat & electricty |
| malleable | may be hammered or rolled into sheets |
| ductile | may be drawn into wires |
| metallic bonding | positively charged ions surrounded by sea of electrons |
| radioactive bonding | nucleus breaks down and gives off particles and energy |
| transition element | groups 3-12 of periodic table |
| sublimation | process -- changing directly from solid to vapor (no liquid) |
| nonmetal | usually gas or solids at room temperature --brittle & powdery - poor conductors |
| diatomic molecule | consists of two atoms of same element in covalent bond |
| substance | element or compound that cannot be broken down further |
| metalloid | have some properties of metals & nonmetals -solid at room temp.- stairstep |
| allotrope | different molecular structures of same element |
| semiconductor | conduct electrity under certain conditions |
| transuranium element | more than 92 protons |
