Anything that has mass and occupies space is defined as [blank]
matter
The basic building blocks of all substances are the [blank]
elements
The number of all elements known today are [blank]
104
An arrangement of elements by similar chemical properties is accomplished in the [blank] table
periodic
An [blank] is the smallest particle of an element that can exist
atom
Substances composed of two or more elements are called [blank]
compounds
A [blank] is the smallest unit of a compound formed by the union of two or more atoms
molecule
The physical state that retains a definite shape and volume is a [blank]
solid
A gas [has no,has] definite shape or volume
has no
During the process of [blank], solids will go directly to the gaseous state, bypassing the liquid state
sublimation
The attraction forces between the molecules of a liquid are [more, less] than those in a solid
less
Different [blank] are separated by definite visible boundaries
phases
Carbon containing substances are classified as [blank]
organic
[blank] substances encompasses all non-carbon-containing materials
inorganic
a [blank] analysis describes the identity of a material, and a [blank] analysis relates to a determination of the quantity of a substance
Qualitative and quantitative
The study of the absorption of light by chemical substances is known as [blank]
spectrophotometry
The separation of a mixture's components can be accomplished utilizing the technique of [blank]
chromatography
T or F: Henry's Law describes the distribution between a stationary liquid phase and gas phase
true
The [higher, lower] the solubility of a gas in a liquid, the greater will be its tendency to remain dissolved in that liquid
higher
T or F: In order for chromatography to occur, one phase must be made to move continuously in one direction over a stationary phase
true
A technique that separates mixtures on the basis of their distribution continuously in one direction over a stationary liquid phase and a moving gas phase is [blank]
gas chromatography
The time required for a substance to travel through the gas chromatographic column is a useful identifying characteristic known as [blank]
retention time
Solid materials that are not readily dissolved in solvents for injection into the gas chromatograph can [blank] into numerous gaseous products prior to entering the gas chromatograph
pyrolyze
A major advance of high-performance liquid chromatography is that the entire process takes place at [blank] temperature
room
A technique that uses a moving liquid phase and a stationary solid phase to separated mixtures is [blank]
TLC
Since most chemical compounds are colorless, the final step of the thin layer development usually requires that they be [blank] by spraying with a chemical reagant
visual
The distance a spot has traveled up a thin-layer plate can be assigned a numerical value known as the [blank] value
Rf
T or F: Thin layer chromotography yields the positive identification of a material
false
The migration of materials along a stationary phase under the influence of an electrical potential describes the technique of [blank]
electrophoresis
T or F: Color is a usual indication that substances selectively absorb light
true
The distance between successive identical points on a wave is known as [blank]
wavelength
T or F: Frequency and wavelength are directly proportional to one another
false
Light, xrays, and radio waves are all members of the [blank] spectrum
electromagnetic
Red light is [higher, lower] in frequency than violet light
higher
Light that has all its waves pulsating in unison is called [blank]
lasers
One model of light depicts it as consisiting of energy particles known as [blank]
photons
T or F: The energy of a light particle is directly proportional to its frequency
true
Red light is [more,less] energetic than violet light
less
The selective absorption of electromagnetic radiation by materials [can, cannot] be used as an aid for identification
can
The amount of radiation a substance will absorb is directly proportional to its concentration as defined by [blank] law
beer's
The [blank] is the instrument used to measure and record the absorption spectrum of a chemical substance
spectrophotometer
The function of the [blank] is to select a single frequency of light emanating from the spectrophotometer's source
monochromator
An [ultraviolet, infrared] absorption spectrum provides a unique "fingerprint" of a chemical substance
infrared
The technique of [blank] exposes molecules to a beam of high-energy electrons in order to fragment them
mass spectrometry
T or F: A mass spectrum is normally considered to be a specific means for identifying a chemical substance
true