General chemistry

the order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state o…

an electrical force linking atoms

an electrical force linking atoms

a chemical bond that involves sharing a pair of electrons between atoms in a molecule

a chemical bond in which one atom loses an electron to form a positive ion and the other atom gains an electron to form a negative ion

a chemical bond in which one atom loses an electron to form a positive ion and the other atom gains an electron to form a negative ion

a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons

a chemical bond in which one atom loses an electron to form a positive ion and the other atom gains an electron to form a negative ion

one of two or more atoms with the same atomic number but with different numbers of neutrons

the sum of the number of neutrons and protons in an atomic nucleus

a chemical bond in which electrons are shared over many nuclei and electronic conduction occurs

of or being a nonmetallic element that has some of the properties of metal; "arsenic is a metalloid element"

an elementary particle with 0 charge and mass about equal to a proton; enters into the structure of the atomic nucleus

the sum of the number of neutrons and protons in an atomic nucleus

(chemistry) a tabular arrangement of the chemical elements according to atomic number as based on the periodic law

(chemistry) the relation between the quantities of substances that take part in a reaction or form a compound (typically a ratio of whole intege…

an electron in the outer shell of an atom which can combine with other atoms to form molecules

(physics and chemistry) the smallest component of an element having the chemical properties of the element

(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight

(chemistry) two or more atoms bound together as a single unit and forming part of a molecule

(chemistry) a process in which one or more substances are changed into others; "there was a chemical reaction of the lime with the ground water"

(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight

(chemistry) two or more atoms bound together as a single unit and forming part of a molecule

any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.

any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.

(physics and chemistry) the simplest structural unit of an element or compound

a chemical element lacking typical metallic properties

(chemistry) two or more atoms bound together as a single unit and forming part of a molecule

(chemistry) a process in which one or more substances are changed into others; "there was a chemical reaction of the lime with the ground water"

A basic particle of an element.

A substance made from different elements chemically joined together.

A bond in which atoms share electrons.

A substance made from one type of atom.

A bond caused by attraction between positive and negative ions.

A version of an element with a different number of neutrons.

Substances combined without forming a new chemical compound.

The mass of a fixed chemical amount called one mole.

Two or more atoms joined together.

a negatively charged ion

a positively charged ion

a covalent bond in which both electrons are provided by one of the atoms

a side bond that links two adjacent chains of atoms in a complex molecule

a side bond that links two adjacent chains of atoms in a complex molecule

a covalent bond in which both electrons are provided by one of the atoms

an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)

a covalent bond in which two pairs of electrons are shared between two atoms

an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)

a chemical bond consisting of a hydrogen atom between two electronegative atoms (e.g., oxygen or nitrogen) with one side being a covalent bond a…

the atomic number of an extra stable strongly bound atomic nucleus: 2, 8, 20, 28, 50, 82 or 126

the primary linkage of all protein structures; the chemical bond between the carboxyl groups and amino groups that unites a peptide

the primary linkage of all protein structures; the chemical bond between the carboxyl groups and amino groups that unites a peptide

a radioactive isotope of an element; produced either naturally or artificially

(chemistry) in the formation of a coordinate bond it is the compound to which electrons are donated

any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt

any group or radical of the form RCO- where R is an organic group; "an example of the acyl group is the acetyl group"

any group or radical of the form RCO- where R is an organic group; "an example of the acyl group is the acetyl group"

a chemical reaction in which one molecule is added to another

a compound formed by an addition reaction

a silvery ductile metallic element found primarily in bauxite

the chemical group -OH

the chemical group -OH

the chemical group -CHO

the chemical group -CHO

a reaction of aldehydes resulting in an aldol

any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water; "bases include oxides…

any of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbons

any of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbons

any of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbons

any of several different crystalline forms of the same chemical compound; "calcium carbonate occurs in the allomorphs calcite and aragonite"

the univalent unsaturated organic radical C3H5; derived from propylene

the univalent unsaturated organic radical C3H5; derived from propylene

the univalent unsaturated organic radical C3H5; derived from propylene

a compound of alumina and a metallic oxide

a silvery ductile metallic element found primarily in bauxite

a silvery ductile metallic element found primarily in bauxite

a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms

the radical -NH2

the radical -NH2

a complex inorganic compound that contains ammonia molecules

A substance that acts as a base or an acid, depending on the pH of the solution into which it is introduced.

A substance that acts as a base or an acid, depending on the pH of the solution into which it is introduced.

a hydrocarbon radical that occurs in many organic compounds

a compound formed from one or more other compounds in a reaction resulting in removal of water

a compound characterized by an active anion

any of various compounds that are added to gasoline to reduce engine knocking

a metallic element having four allotropic forms; used in a wide variety of alloys; found in stibnite

the univalent group derived from arsine

a compound of arsenic with a more positive element

a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a…

a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in na…

a chemical compound containing the azido group combined with an element or radical

the univalent group N3- derived from hydrazoic acid

the univalent group N3- derived from hydrazoic acid

the bivalent group -N=N- united to two hydrocarbon groups

the bivalent group -N=N- united to two hydrocarbon groups

a soft silvery metallic element of the alkali earth group; found in barite

a soft silvery metallic element of the alkali earth group; found in barite

any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water; "bases include oxides…

a light strong brittle grey toxic bivalent metallic element

a colorless oily compound extracted from coal tar and used in manufacturing synthetic resins

any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in mak…

the univalent radical derived from benzoic acid

the univalent radical derived from benzoic acid

the univalent radical derived from toluene

the univalent radical derived from toluene

the univalent radical derived from toluene

a light strong brittle grey toxic bivalent metallic element

a heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores…

chemical compound composed of only two elements

a heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores…

any one of several hundred compounds having a bitter taste; not admitting of chemical classification

(chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance

(chemistry) an ionic compound that resists changes in its pH

a hydrocarbon radical (C4H9)

the univalent group derived from arsine

the univalent group derived from arsine

the univalent group derived from arsine

a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores

a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal

a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most…