Chapter I Vocab
Organic chemistry
Rx (pharmaceuticals)/ Carbon-based molecules
Understanding how chemicals work
Pure chemistry
Deals with the amount of matter (mass, volume, and density)
Extensive property
mixture, soup, can be separated
Heterogeneous
Early scientific method (measuring mass)
Lavoisier
Inorganic chemistry
Not Carbon-based, may be metals or nonmetals
Doing something useful
Applied chemistry
deals with the specific characteristics to the substance (category)
Intensive property
same throughout, mixed, not individual, solution, cannot be separated
Homogeneous
Believed that atoms were indivisible and indestructible
Democritus
Biochemistry
studying chemical reactions in organisms
the variable that responds to changes
Dependent variable
characteristics that don’t involve changing the matter
Physical property
The ability of a substance to undergo a specific chemical change
chemical property
Transformed Democritus’s ideas on atoms to a scientific theory; used scientific method
Dalton
Analytical chemistry
tests to analyze chemical reaction (like blood tests)
The variable that we manipulate to observe changes
Independent variable
involves the bonding or reactivity (changing into something else)
Chemical property
Change that produces matter with a different composition than the original matter; composition of matter always changes
chemical change
discovered cathode-ray tube
J.J Thomson
Physical chemistry
studying physics/chemistry of processes
Scientific method steps:
Observation
Hypothesis
Experimentation
Accept/reject the hypothesis
Conclusion
Theory
Law
What's the difference between a physical change and a chemical change?
A physical change changes properties but not substances; where a chemical change changes into something else
Chemical change verbs
Rusts, corrodes, burns, explodes, rots, sours, decays, ferments, decomposes, fries, bakes
discovered mass of an electron (1/1840 of a proton/neutron)
Millikan