mid terms vocab flashcards

chemistry
the study of the composition of matter
scientific method
logical approach to the solution of scientific problems
observation
information obtained through the senses; observation in science often involves a measurement
mass
the amount of matter the object contains
volume
the space occupied by a sample of matter
vapor
a substance in a gaseous state that is ordinarily a liquid or solid at room temperature
chromatography
a chemical process used for separating mixtures into their constituents by virtue of differences in absorbance’s
density
the ratio of the mass of an object to its volume
error
the differences between the accepted value and the experimental value
percent error
the percent that a measured value differs from the accepted value
significant digits (figures)
all the digits that can be known precisely in a measurement, plus a last estimated digit
specific gravity
the ratio of the density of a substance to that of a standard substance (usually water)
conversion factor
a ratio of equivalent measurements used to convert a quantity from one unit to another
maslleable
able to be hammered or pressed permanently out of shape without breaking or cracking
luster
a gentle sheen or glow
energy shell
a region around the nucleus of an atom where an electron is likely to be moving
binary compounds
a compound composed of 2 elements
ionic bonds
the electrostatic attraction that binds oppositely charged ions together
covalent bonds
a chemical bond that involves sharing a pair of electron between atoms in molecule
Avagadros number
the number of representative particles contained in one mole of a substance; equal to 6.02×10 particles
mole
the amount of a substance that contains 6.02×10 representatives particles of that substance
molar mass
a general expression used the refer to the mass of a mole of any substance unless a more specific term is needed to avoid confusion
STP
standard temperature pressure
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