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OCHEM

Chapter 1

TermDefinition
Harry Kroto 20th century chemist, studied interstellar dust, discovered 3rd form of carbon, buckminsterfullerene
nanotechnology making materials, manipulating individual atoms/molecules
technology using known knowledge of the natural world for practical purposes
scientific fact agreed upon by competent observers as being true
hypothesis a suggested explanation for an observed phenomenon
scientific hypothesis hypothesis that can be tested through experiments
scientific law/principle hypothesis tested over and over, never contradicted, expressed mathematically.
scientific theory a well tested explanation, unifies broad range of observations within natural world
chemistry study of matter and the transformations it can undergo.
matter anything that has mass and occupies space
basic research research that leads to a greater understanding of how the world operates
applied research useful application of knowledge gathered by basic research
green chemistry chemistry devoted to climate change
physical qualities mass, length, time, weight, energy, temperature, heat and density
measurements consist of: a number and a unit
measurement unit of length kilometer, km
measurement unit of mass kilogram, kg
measurement unit of time second, s
measurement unit of temperature kelvin, K
measurement unit of amount of substance mole, mol
measurement unit of electric current ampere, A
measurement of luminous intensity candela, cd
kilo symbol and representation K, 10^3
mega symbol and representation M, 10^6
centi- symbol and representation c, 10^-2
milli- symbol and representation m, 10^-3
micro- symbol and representation μ, 10^-6
nano- symbol and representation n, 10^-9
scientific process ask a question, propose reproducible/testable claim , test your claim
quantitative observation (measurement) made by using an instrument, always involves number and unit
qualitative observation made using senses
USCS US customary system
SI international sytem of units, metric
exact quantity no uncertainty, infinite significant figures
measured quantity limited number of significant figures
Created by: ilredus
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