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Chemistry 1070 @ NSU - Shreveport Dr. Fry
Chapters 4,5,12
58
Chemistry
Undergraduate 1
10/11/2009

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Term
An Electrically charged atom or group of atoms
Definition
Ion
Term
A positively charged Ion
Definition
Cation
Term
A negatively charged ion
Definition
Anion
Term
The energy required to remove one electron from a single atom in the gaseous state
Definition
Ionization Energy
Term
The energy released on adding an electron to a single atom in the gaseous state
Definition
Electron affinity
Term
The electrical attraction between ions of opposite charge in a crystal
Definition
Ionic bond
Term
A crystalline solid held together by ionic bonds
Definition
Ionic Solid
Term
A compound that contains ionic bonds
Definition
Ionic compound
Term
An Ion that is composed of more than one atom.
Definition
Polyatomic Ion
Term
The formula that identifies the smallest neutral unit of an ionic compound
Definition
Formula Unit
Term
Main group elements tend to undergo reactions that leave them with 8 valence electrons
Definition
Octet Rule
Term
An atomic symbol with dots placed around it to indicate the number of valence electrons
Definition
Electron-dot symbol
Term
A substance that provides H+ ions in water
Definition
Acid
Term
A substance that provides OH- ions in water
Definition
Base
Term
Atoms are converted into ________ by the loss of one or more electrons
Definition
Cations
Term
Atoms are converted into ____ by the gain of one or more electrons
Definition
Anions
Term
Ionic Compounds are composed of cations and anions held together by
Definition
Ionic bonds
Term
_____ loses electrons more easily than ________
Definition
metals , nonmetals
Term
What determines the chemical formula of an ionic compound?
Definition
Ionic compounds contain appropriate numbers of anions and cations to maintain overall neutrality, thereby providing a means of determining their chemical formulas
Term
A bond formed by sharing electrons between atoms
Definition
Covalent bond
Term
A group of atoms held together by covalent bonds
Definition
molecule
Term
The optimum distance between nuclei in a covalent bond
Definition
Bond length
Term
A compound that consists of molecules rather than ions
Definition
Molecular compound
Term
A covalent bond formed by sharing one electron pair
Definition
Single bond
Term
A covalent bond formed by sharing two electron pairs
Definition
Double bond
Term
A covalent bond formed by sharing three electron pairs
Definition
Triple bond
Term
The covalent bond that forms when both electrons are donated by the same atom
Definition
Coordinated covalent bond
Term
A formula that shows the numbers and kinds of atoms in one molecule of a compound
Definition
Molecular formula
Term
A molecular representation that shows the connections among atoms by using lines to represent covalent bonds
Definition
Structural formula
Term
A molecular representation that shows both the connections among atoms ad the locations of lone pair valence electrons
Definition
Lewis Structure
Term
Pair of electrons that is not used for bonding
Definition
Lone Pair
Term
A molecular representation in which bonds are understood by the order in which they are written rather than specifically shown
Definition
Condensed structure
Term
The angle formed by three adjacent atoms in a molecule
Definition
Bond angle
Term
A geometric figure with 4 identical triangular faces
Definition
Regular tetrahedron
Term
A bond in which the electrons are attracted more strongly by one atom than by the other
Definition
Polar covalent bond
Term
The ability of an atom to attract electrons in a covalent bond
Definition
Electronegativity
Term
A compound formed by combination of two different elements
Definition
Binary compound
Term
Ionic compound properties
Definition
Smallest components are Ions, usually composed of metals combined with nonmetals, crystalline solids, high melting points, high boiling points, conduct electricity when molten, many water soluble, not soluble in organic liquids
Term
Molecular compound properties
Definition
Smallest components are molecules, usually composed of nonmetals with nonmetals, gases liquids or low melting solids, low melting points, low boiling points, do not conduct electricity, few are water soluble, many are soluble in organic liquids.
Term
The study of carbon compounds
Definition
Organic Chemistry
Term
_____ molecules often contain hydrogen, nitrogen, and oxygen in addition to carbon
Definition
organic
Term
An atom or group of atoms within a molecule that has a characteristic structure and chemical behavior
Definition
functional group
Term
an organic compound that contains only carbon and hydrogen
Definition
Hydrocarbon
Term
a hydrocarbon that has only single bonds
Definition
alkane`
Term
an alkane that has all its carbons connected in a row
Definition
straight-chain alkane
Term
an alkane that has a branching connection of carbons
Definition
Branched-chain alkane
Term
Compounds with the same molecular formula but different structures
Definition
Isomers
Term
Compounds with the same molecular formula but different connections among their atoms
Definition
Constitutional isomers
Term
A shorthand way of drawing structures in which C-C and C-H bonds are understood rather than shown.
Definition
Condensed structure
Term
The specific three dimensional arrangement of atoms in a molecule
Definition
Conformation
Term
Molecular structures having identical connections between atoms , they represent identical compounds
Definition
Conformer
Term
An atom or group of atoms attached to a parent compound
Definition
Substituent
Term
The part of an alkane that remains when a hydrogen atoms is removed
Definition
Alkyl Group
Term
The -CH3 alkyl Group
Definition
Methly group
Term
The -CH2,CH3, alkyl group
Definition
Ethyl group
Term
The straight chain alkyl group _CH2CH2CH3
Definition
Propryl group
Term
The branched chain alkyl group - CH(CH3)2
Definition
Isopropyl group
Term
name the ten alkanes.. starts with methane
Definition
Methane, ethane, propane, butane, pentane, hexane, heptane, octane, nonane,decane
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