A measure of the average kinetic energy of matter (measured in degrees).
The temperature at which all molecular motion theoretically would stop.
A neutral particle with a centrally located nucleus surrounded by electrons; the smallest unit of an element.
A process that changes the identity of matter.
A substance that consists of atoms of different substances chemically bonded together.
A substance that cannot be broken down by ordinary chemical means into a simpler (and more stable) substance.
The ability to do work.
A process that absorbs heat energy
The measure of randomness or disorder in a system.
A process that releases heat energy.
A combination of chemical symbols and subscripts that tells the number and kinds of elements in a compound.
Thermal energy in transit from one object to another.
A mixture composed of two or more distinct substances, unevenly blended.
A mixture of two or more distinct substances, evenly blended.
Two or more covalently bonded atoms found as a distinct unit.
Anything that occupies space and has mass.
Two or more substances physically combined with no definite proportions.
A property of matter that can be measured or observed without changing the identity of the matter.
An process that changes the physical properties of a substance without changing its identity.
A substance that is made up of only one kind of particle and has uniform composition.
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