a white powder, LiAlH4, used chiefly as a chemical reducing agent, esp. in pharmaceutical and perfume manufacturing.
silver
a white, ductile metallic element, used for making mirrors, coins, ornaments, table utensils, photographic chemicals, conductors, etc.
lead
a heavy, comparatively soft, malleable, bluish-gray metal, sometimes found in its natural state but usually combined as a sulfide
earth
any of several metallic oxides that are difficult to reduce, as alumina, zirconia, and yttria
simple
composed of only one substance or element, not mixed
element
one of a class of substances that cannot be separated into simpler substances by chemical means, part of the periodic table
sweet
devoid of corrosive or acidic substances, or fuel oil or gas containing no sulfur compounds
salt
any of a class of compounds formed by the replacement of hydrogen atoms of an acid with elements or groups, and which usually ionize in solution
sugar
a member of the same class of carbohydrates, as lactose, glucose, or fructose
iron
a malleable, metallic element, scarce in its pure condition, but used in its crude or impure carbon-containing forms for making tools and machinery
stability
resistance or the degree of resistance to chemical change or disintegration
secondary
obtained by the replacement of two atoms or groups; noting or containing a carbon atom united to two other carbon atoms in a chain or ring molecule
carbon
an element that forms organic compounds with hydrogen and oxygen, that occurs in a pure state as diamond and graphite, in an impure state as charcoal
indicator
a substance, as litmus, that indicates the presence or concentration of a certain constituent
ether
formerly one of a class of compounds in which two organic groups are attached directly to an oxygen atom, having the general formula ROR
molecule
a quantity of a substance, the weight of which, measured in any chosen unit, is numerically equal to the molecular weight; gram molecule
suspension
the state in which the particles of a substance are mixed with a fluid but are undissolved
noble
inert or chemically inactive
silicon
a nonmetallic element with amorphous and crystalline forms occurring in minerals and rocks, constituting more than 1/4 of the earth's crust
tin
a low-melting, malleable, ductile metallic element nearly approaching silver in color and luster, used in plating and in making alloys and tinfoil
residue
an atom or group of atoms that remains as a solid on a filter paper after a liquid passes through in the filtration procedure
uranium
white, radioactive, metallic element, occurring in pitchblende, the 235 isotope is used in atomic and hydrogen bombs and as a fuel in nuclear reactors
synthesis
the forming or building of a more complex substance or compound from elements or simpler compounds
neon
a chemically inert gaseous element occurring in small amounts in the earth's atmosphere, used chiefly in a type of electrical lamp
nickel
a hard, ductile, malleable metallic element, allied to iron and cobalt, used in alloys, in electroplating, and as a catalyst in organic synthesis
aluminum
a silver-white metallic element, light in weight, ductile, malleable, occurring combined in nature in igneous rock, shale, clay, and most soil
zinc
a ductile, bluish-white metallic element: used in making galvanized iron, brass, and other alloys, and as an element in voltaic cells. Symbol: Zn; atomic weight: 65.37; atomic number: 30; specific gravity: 7.14 at 20?C.
nitrate
a salt or ester of nitric acid, or any compound containing the univalent group ?ONO2 or NO3
synthesize
to combine elements into a single, unified entity
magnesium
a metallic element that burns with a white light, used in alloys, flares, flashbulbs, optical mirrors, precision instruments, and sometimes batteries
potassium
a silvery-white metallic element that oxidizes rapidly in the air and whose compounds are used as fertilizer and in special hard glasses
inhibitor
a substance that decreases the rate of or stops a chemical reaction
inert
having little or no ability to react
condensation
a reaction between organic molecules leading to the formation of a larger molecule and the elimination of a simple molecule such as water or alcohol
lithium
a soft, silver-white metallic element, the lightest of all metals
antioxidant
any substance that inhibits oxidation, as a substance that inhibits oxidative deterioration of gasoline, rubbers, plastics, soaps, etc
sulfate
a salt or ester of sulfuric acid
reactivity
the relative capacity of an atom, molecule, or radical to undergo a chemical reaction with another atom, molecule, or compound
oxidize
to combine an element with oxygen or to cover with a coating of oxide or rust; to take away hydrogen, as by the action of oxygen
tungsten
a rare, metallic element with a bright-gray color and a high melting point, used in alloys of high-speed cutting tools and electric-lamp filaments
argon
a colorless, odorless, chemically inactive, gaseous element that, because of its inertness, is used for filling fluorescent and incandescent lamps
paraffin
one of the alkane series that is solid at ordinary temperatures with a boiling point over 300?C
radium
a highly radioactive metallic element whose decay yields radon gas and alpha rays
krypton
an inert, monatomic gaseous element, present in very small amounts in the atmosphere
thallium
a soft, malleable, rare, bluish-white metallic element: used in the manufacture of alloys and, in the form of its salts, in rodenticides
atomic volume
the atomic weight of an element divided by its density: Abbreviation: at. vol.
atomic weight
the average weight of an atom of an element after 1961 based on 1/12 the weight of the carbon-12 atom: Abbreviation: at. wt.
molecular weight
the average weight of a molecule of an element measured in units based on 1/12 the weight of the carbon-12 atom: Abbreviation: mol. wt.
law of definite composition
the statement that in a pure compound the elements are always combined in fixed proportions by weight
mineral jelly
a gelatinous product made from petroleum, used to stabilize certain explosives
Paris green
an emerald-green, poisonous, water-insoluble powder made from arsenic trioxide and copper acetate used as pigment, insecticide or wood preservative
uranium dioxide
a black, crystalline compound, UO2, insoluble in water, used in nuclear fuel rods, in ceramics, and pigments
lithium aluminum hydride
a white powder, LiAlH4, used chiefly as a chemical reducing agent, esp. in pharmaceutical and perfume manufacturing.
silver
a white, ductile metallic element, used for making mirrors, coins, ornaments, table utensils, photographic chemicals, conductors, etc.
lead
a heavy, comparatively soft, malleable, bluish-gray metal, sometimes found in its natural state but usually combined as a sulfide
earth
any of several metallic oxides that are difficult to reduce, as alumina, zirconia, and yttria
simple
composed of only one substance or element, not mixed
element
one of a class of substances that cannot be separated into simpler substances by chemical means, part of the periodic table
sweet
devoid of corrosive or acidic substances, or fuel oil or gas containing no sulfur compounds
salt
any of a class of compounds formed by the replacement of hydrogen atoms of an acid with elements or groups, and which usually ionize in solution
sugar
a member of the same class of carbohydrates, as lactose, glucose, or fructose
iron
a malleable, metallic element, scarce in its pure condition, but used in its crude or impure carbon-containing forms for making tools and machinery
stability
resistance or the degree of resistance to chemical change or disintegration
secondary
obtained by the replacement of two atoms or groups; noting or containing a carbon atom united to two other carbon atoms in a chain or ring molecule
carbon
an element that forms organic compounds with hydrogen and oxygen, that occurs in a pure state as diamond and graphite, in an impure state as charcoal
indicator
a substance, as litmus, that indicates the presence or concentration of a certain constituent
ether
formerly one of a class of compounds in which two organic groups are attached directly to an oxygen atom, having the general formula ROR
molecule
a quantity of a substance, the weight of which, measured in any chosen unit, is numerically equal to the molecular weight; gram molecule
suspension
the state in which the particles of a substance are mixed with a fluid but are undissolved
noble
inert or chemically inactive
silicon
a nonmetallic element with amorphous and crystalline forms occurring in minerals and rocks, constituting more than 1/4 of the earth's crust
tin
a low-melting, malleable, ductile metallic element nearly approaching silver in color and luster, used in plating and in making alloys and tinfoil
residue
an atom or group of atoms that remains as a solid on a filter paper after a liquid passes through in the filtration procedure
uranium
white, radioactive, metallic element, occurring in pitchblende, the 235 isotope is used in atomic and hydrogen bombs and as a fuel in nuclear reactors
synthesis
the forming or building of a more complex substance or compound from elements or simpler compounds
neon
a chemically inert gaseous element occurring in small amounts in the earth's atmosphere, used chiefly in a type of electrical lamp
nickel
a hard, ductile, malleable metallic element, allied to iron and cobalt, used in alloys, in electroplating, and as a catalyst in organic synthesis
aluminum
a silver-white metallic element, light in weight, ductile, malleable, occurring combined in nature in igneous rock, shale, clay, and most soil
zinc
a ductile, bluish-white metallic element: used in making galvanized iron, brass, and other alloys, and as an element in voltaic cells. Symbol: Zn; atomic weight: 65.37; atomic number: 30; specific gravity: 7.14 at 20?C.
nitrate
a salt or ester of nitric acid, or any compound containing the univalent group ?ONO2 or NO3
synthesize
to combine elements into a single, unified entity
magnesium
a metallic element that burns with a white light, used in alloys, flares, flashbulbs, optical mirrors, precision instruments, and sometimes batteries
potassium
a silvery-white metallic element that oxidizes rapidly in the air and whose compounds are used as fertilizer and in special hard glasses
inhibitor
a substance that decreases the rate of or stops a chemical reaction
inert
having little or no ability to react
condensation
a reaction between organic molecules leading to the formation of a larger molecule and the elimination of a simple molecule such as water or alcohol
lithium
a soft, silver-white metallic element, the lightest of all metals
antioxidant
any substance that inhibits oxidation, as a substance that inhibits oxidative deterioration of gasoline, rubbers, plastics, soaps, etc
sulfate
a salt or ester of sulfuric acid
reactivity
the relative capacity of an atom, molecule, or radical to undergo a chemical reaction with another atom, molecule, or compound
oxidize
to combine an element with oxygen or to cover with a coating of oxide or rust; to take away hydrogen, as by the action of oxygen
tungsten
a rare, metallic element with a bright-gray color and a high melting point, used in alloys of high-speed cutting tools and electric-lamp filaments
argon
a colorless, odorless, chemically inactive, gaseous element that, because of its inertness, is used for filling fluorescent and incandescent lamps
paraffin
one of the alkane series that is solid at ordinary temperatures with a boiling point over 300?C
radium
a highly radioactive metallic element whose decay yields radon gas and alpha rays
krypton
an inert, monatomic gaseous element, present in very small amounts in the atmosphere
thallium
a soft, malleable, rare, bluish-white metallic element: used in the manufacture of alloys and, in the form of its salts, in rodenticides
atomic volume
the atomic weight of an element divided by its density: Abbreviation: at. vol.
atomic weight
the average weight of an atom of an element after 1961 based on 1/12 the weight of the carbon-12 atom: Abbreviation: at. wt.
molecular weight
the average weight of a molecule of an element measured in units based on 1/12 the weight of the carbon-12 atom: Abbreviation: mol. wt.
law of definite composition
the statement that in a pure compound the elements are always combined in fixed proportions by weight
mineral jelly
a gelatinous product made from petroleum, used to stabilize certain explosives
Paris green
an emerald-green, poisonous, water-insoluble powder made from arsenic trioxide and copper acetate used as pigment, insecticide or wood preservative
uranium dioxide
a black, crystalline compound, UO2, insoluble in water, used in nuclear fuel rods, in ceramics, and pigments
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