Chem
Terms
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- gas
- the form of matter that is an easily compressible fluid, an shape or size
- significant figures
- the digits in a measurement number that include all certain digits plus a final digit plus a final digit having some uncertainty
- law
- a concise statement or mathematical equation about a fundamental relationship
- giga
- 10^9 G
- element
- a substance that cannot be decomposed by any chemical reaction into simpler substances
- experiment
- an observation of natural phenomena carried out in a controlled manner so that the results can be duplicated
- law of definite proportion
- a pure compound whatever its source always contains definite proportions of the elements by mass
- deci
- 10^-1 d
- mega
- 10^6 M
- exact number
- a number that arises when you count items or sometimes when you define a unit
- substance
- a kind of matter that cannot be separated into other kinds of matter by any physical process
- law of conservation of matter
- the total mass remains constant during a chemical change
- dimensional analysis
- is the method of calculation in which one carries along the units for quantities
- mixture
- is a material that can be separated by physical means into two or more substances
- accuracy
- the closeness of a single measurement to the true value
- centi
- 10^-2 c
- mass
- the quantity of matter in a material
- micro
- 10^-6 mu
- precision
- closeness of the set of values obtained from identical measurements of quantity
- phase
- is one of several different homogeneous materials present in the portion of matter under study
- matter
- whatever occupies space and can be perceived by our senses
- unit
- with a fixed standard of measurement
- liquid
- the form of matter that is a relatively incompressible fluid, fixed volume but no fixed shape
- rounding
- the procedure of dropping non sig figs in a calculation result and adjusting the last digit
- physical change
- a change in the form of matter but NOT in its chemical properties
- solid
- the form of matter characterized by rigidity, fixed shape and volume
- chemical change
- is a change in which one or more kinds of matter are transformed into a new kind of matter or several new kinds of matter
- theory
- a tested explanation of basic natural phenomena
- chemical property
- a characteristic of a material involving its chemical change
- milli
- 10^-3 m
- compound
- is a substance composed of two or more elements chemically combined
- pico
- 10^-12 p
- homogenous mixture
- a mixture that is uniform in its properties throughout given samples
- hypothesis
- a tentative explanation or regularity of nature
- conversion factor
- a factor equal to 1 that converts a quantity in one unit to a quantity expressed in another unit
- heterogeneous mixture
- a mixture that consists of physically distinct parts, each with different properties
- nano
- 10^-9 n
- density
- mass per unit volume =mass/volume
- kilo
- 10^3 k
- physical property
- a characteristic that can be observed for a material without changing it chemical identity