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intro to chemistry
things to know
| Question | Answer |
|---|---|
| metals | left of the periodic table |
| metals are.? | good conductors of heat, malleable, ductile, have a shiny luster |
| metals have how many valence electrons in the outermost energy level? | generally have one, two or three |
| nonmetals | on the right of the periodic table |
| nonmetals have how any valence eletrons | have 4 or more |
| nonmeatals are..? | dull, brittle if solids, poor conductors of heat |
| metalliods | have properties of metals, and nonmetals, depends of temperature |
| period | the horizontal row |
| group/ family | the columns up and down |
| atomic mass | the mass of a naturally occuring sample of an element |
| chlorine | the green gas halogen |
| the liquid nonmetal | bromine |
| the liquid metal | merucry |
| silver | coinage metal |
| iron | magnetic |
| argon | a gas which fills light bulbs |
| oxygen | ozone is a form of this element |
| iodine | a silver crystalled halogen, which forms a purple gas |
| catalyst | substance that affects the reaction rate without being used up in the process |