General Chemistry (CHEM111H) Accurate Definitions
microscopic domain✔✔realm of things that are much too small to be sensed directly
milliliter✔✔(mL) 1/1,000 of a liter; equal to 1 cm3
mixture✔✔matter that can be separated into its components by physical means
molecule✔✔bonded collection of two or more atoms of the same or different elements
physical change✔✔change in the state or properties of matter that does not involve a change in
its chemical composition
physical property✔✔characteristic of matter that is not associated with any change in its
chemical composition
plasma✔✔gaseous state of matter containing a large number of electrically charged atoms
and/or molecules
precision✔✔how closely a measurement matches the same measurement when repeated
pure substance✔✔homogeneous substance that has a constant composition
rounding✔✔procedure used to ensure that calculated results properly reflect the uncertainty in
the measurements used in the calculation
, scientific method✔✔path of discovery that leads from question and observation to law or
hypothesis to theory, combined with experimental verification of the hypothesis and any
necessary modification of the theory
second✔✔(s) SI unit of time
SI units✔✔(International System of Units) standards fixed by international agreement in the
International System of Units (Le Système International d'Unités)
accuracy✔✔how closely a measurement aligns with a correct value
atom✔✔smallest particle of an element that can enter into a chemical combination
Celsius✔✔(°C) unit of temperature; water freezes at 0 °C and boils at 100 °C on this scale
chemical change✔✔change producing a different kind of matter from the original kind of matter
chemical property✔✔behavior that is related to the change of one kind of matter into another
kind of matter
chemistry✔✔study of the composition, properties, and interactions of matter
compound✔✔pure substance that can be decomposed into two or more elements
cubic centimeter (cm3 or cc)✔✔volume of a cube with an edge length of exactly 1 cm
microscopic domain✔✔realm of things that are much too small to be sensed directly
milliliter✔✔(mL) 1/1,000 of a liter; equal to 1 cm3
mixture✔✔matter that can be separated into its components by physical means
molecule✔✔bonded collection of two or more atoms of the same or different elements
physical change✔✔change in the state or properties of matter that does not involve a change in
its chemical composition
physical property✔✔characteristic of matter that is not associated with any change in its
chemical composition
plasma✔✔gaseous state of matter containing a large number of electrically charged atoms
and/or molecules
precision✔✔how closely a measurement matches the same measurement when repeated
pure substance✔✔homogeneous substance that has a constant composition
rounding✔✔procedure used to ensure that calculated results properly reflect the uncertainty in
the measurements used in the calculation
, scientific method✔✔path of discovery that leads from question and observation to law or
hypothesis to theory, combined with experimental verification of the hypothesis and any
necessary modification of the theory
second✔✔(s) SI unit of time
SI units✔✔(International System of Units) standards fixed by international agreement in the
International System of Units (Le Système International d'Unités)
accuracy✔✔how closely a measurement aligns with a correct value
atom✔✔smallest particle of an element that can enter into a chemical combination
Celsius✔✔(°C) unit of temperature; water freezes at 0 °C and boils at 100 °C on this scale
chemical change✔✔change producing a different kind of matter from the original kind of matter
chemical property✔✔behavior that is related to the change of one kind of matter into another
kind of matter
chemistry✔✔study of the composition, properties, and interactions of matter
compound✔✔pure substance that can be decomposed into two or more elements
cubic centimeter (cm3 or cc)✔✔volume of a cube with an edge length of exactly 1 cm
