all things of substance. matter is composed of atoms or molecules
a fundamental particle of matter. an element cannot be broken down into simpler substances by chemical means
a chart of elements arranged in a systematic fashion.vertical rows are called groups or families; horizontal rows are called series. Elements in a given row have similar properties.
a pure substance composed of two or more elements
condition or stage in hte form of matter, a solid, liquid, or gas
a state of matter in which molecules are in held closely together in a rigid state
a state of matter in which molecules are in contact with one another but are not rigidly held in place.
a state of matter in which the attractive forces between molecules are small enough to permit them to move with complete freedom
a physical change from the solid state directly into the gaseous state.
a uniform body of matter different phases are seperated by definite visible boundaries.
describes a substance composed of carbon and often smaller amounts of hydrogen, oxygen, nitrogen, chlorine, phosphorus, or other elements.
describes a chemical compound not based on carbon.
an analytical method for identifying a substance by its selective absorption of different wavelengths of light.
any of several analytical techniques for separating organic mixtures into their components by attraction to a stationary phase while being propelled by a moving phase.
a techinque for separating molecules through migration on a support medium while under the influence of an electrical potential.
polymers of amino acids that play basic roles in the structures and functions of living things.
colored light ranging form red to violet in the electromagnetic spectrum
the distance between crests of adjacent waves.
the number of waves that pass a given point per second.
the entire range of radiation energy form the most energetic cosmic radio waves.
a high- energy, short-wavelength form of electromagnetic radiation.
an acronym for light amplification by stimulated emission of radiation; light that has all its waves pulsating in unison.
a small packet of electromagnetic radiation energy.
a device for isolating individual wavelengths or frequencies of light.
light having a single wavelength or frequency.
invisible long frequencies of light beyond violet in the visible spectrum.
invisible short frequencies of light before red in the visible spectrum.
an atom or molecule bearing a positive or negative charge.