click below
click below
Normal Size Small Size show me how
Chemistry 2/8
| Question | Answer |
|---|---|
| Scientific theory | collect the facts or data formulate a hypothesis plan and do addition experiments to test the hypothesis modify the hypothesis |
| Theory | A well established hypothesis |
| What do theories and hypothesis explain? | natural phenomena |
| What are scientific laws? | simple statements of natural phenomena to which no exceptions are known under the given conditions |
| Hypothesis | A tentative explanation of certain facts that provided a basis for further experimentation |
| Qualitative | physical characteristics |
| Quantitative | based on measurements |
| solid | definite shape and volume |
| amorphous solids | do not have a regular, internal, geometric pattern |
| liquid | definite volume but not definite shape |
| gas | indefinite volume and no fixed shape |
| metals | solids at room temperature high luster good conductors of hear and electricity malleable ductile |
| nonmetals | not lustrous low melting points and densities poor conductors of heat and electricity |
| metalloids | have properties that are intermediate between metals and nonmetals |
| cation | positively charged ion |
| anion | negatively charged ion |
| denser liquids drain out ___ | first |