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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 |