Chp 6,7,8,9-Chem

Any atom or group of atoms with a negative charge
Binary Compound
A compound composed of two elements.
Any atom or group of atoms with a positive charge
Chemical Formula
Shows the number and type of atoms present in the smallest representative unit of a substance
Formula Unit
The lowest whole number ratio of ions in an ionic compound
An atom or group of atoms that has a positive or negative charge
Ionic compound
A compound composed of positive and negative charge
Law of Definite Proportion
In any sample of chemical compound, the elements are always combined in the same proportion by mass
Law of Multiple Proportions
Whenever two elements form more than one compund, the different masses of one element that combine with the same mass of the other element are in the ratio of small whole number
Molecular Compound
A compound that is composed of molecules
Molecular Formula
A chemical formula that shows the actual number and kinds of atoms present in a molecule of a compound
A neutral chemically bonded group of atoms that act as a unit.
Monatomic ion
A single atom with a positive or negative charge as a result of losing or gaining valence electrons
Polyatomic Ion
A tightly bound group of atoms that behaves as a unit and carries a charge
Ternary Compound
A compound containing atoms of three different elements, usually containing at least one polyatomic ion
Avogadro’s Number
The number of representative particles contained in one mole of a substance
Empirical Formula
A formula with the lowest whole number ratio of elements in a compound
Gram Atomic Mass
The mass, in grams, of one mole of atoms in a monatomic element (gam)
Gram Molecular Mass
The mass, in grams, of one mole of a molecular substance (gmm)
Molar Mass
The amount of matter that an object contains
Molar Volume
The volume occupied by 1 mole of a gas at standard temperature and pressure (STP)
The amount of a substance that contains 6.02×10^23 representative particles of a substance
Percent Composition
The percent by mass of each element in a compound
Representative Particle
The smallest unit into chich a substance can be broken down without a change in composition
Standard Temperature and Pressure
The conditions under which the volume of a gaas is usually measured (STP)
Activity Series of Metals
A table listing metals in order of decreasing activity
Balanced Equation
A chemical equation in which mass is conserved; each side has same number of atoms of each element.
A substance that increases the rate of reaction by lowering the activation-energy barrier
Chemical Equation
An expression representing a chemical reaction
A smal whole number that appears in front of a formula in a balanced chemical equation
Combination Reaction
A chemical change in which two or more substances react to form a single new substance
Combustion Reaction
A chemical change in which oxygen reacts with another substance, often producing energy in the form of heat and light
Complete Ionic Equation
An equation or a reaction in solution showing all strong electrolytes as ions
Decomposition Reaction
A chemical change in which a single compound is broken down into two or more simpler products
Double Replacement Reaction
A chemical change that involves and exchange of positive ions between two compounds
Net Ionic Equation
An equation for a reaction in solution showing only those particles that are directly involved in the chemical change.
Single Replacement Reaction
A chemical change in which one element replaces a second element in a compound
Skeleton Equation
A chemical Equation that does not indicate the relative amount or reactants and products
Spectator Ion
An ion that is not directly involved in a chemical reaction an ion that does not change oxidaton number or composition during a reaction
Actual Yield
The amount of product that forms when a reaction is carried out in the lab
Excess Reagent
A reagent present in a quantity that is more than sufficient to;react with a limiting reagent
Limiting Reagent
Any reactant that is used up first in;a chemical;reaction; it determines the amount of product that can be formed in the reaction
Percent Yield
The ratio of the actual yield to the theoretical yield for a chemical reaction expressed as a percentage; a measue of the efficiency of a reaction
That portion of chemistry dealing with numerical relatoinships in chemical reactions
Theoretical Yield
The amount of product that could form during a reaction calculated from a balanced chemical equation
Gram Formula Mass
The mass of one mole of an ionic compound
A starting substance in a chemical reaction
A substance formed in a chemical reaction
To separate a substance in solid form from a solution
A homogeneous mixture
The dissolving medium in a solution
Dissolved paritcles in a solution
A substance that is used in analysis and synthesis
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