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composed of only one type of atom, are the most basic components of the world

Elements

Groups of two or more atoms linked by chemical bonds to form distinct units

Molecules

Substances composed of atoms of two or more elements bonded together

Compounds

The composition of a molecule determine its

Molecular mass

Molecules with the same number and types of atoms but different arrangements of atoms are

Isomers

Is a substance that has the same physical properties throughout

Pure substance

A substance that has the same physical properties throughout is a

Homogeneous substance

Three-dimensional representation of a molecule that shows its shape and the position of its atoms

Molecular model

Is composed of several pure substances that are physically mixed but not chemically united

Mixture

A homogeneous mixture that exists because of attraction between atoms, molecules, or ions is called

Solution

A solution consists of one or more

Solutes

The substance where the solute dissolves

Solvent

A mixture containing tiny suspended clumps or particles is a

Colloid

A heteregoneous mixture whose particles are large enough that they will settle a

Suspension

Molecules and compounds are composed of two or more atoms linked together by attractive forces called

Chemical bonds

A chemical bond resulting from the sharing of valence electrons between atoms is a

Covalent bond

When the two atoms share a single pair of electrons, the bond is a

Single bond

The sharing of two pairs of electrons forms a

Double bond

A multiple bond in which three pairs of electrons are shared is a

Triple bond

A diagram showing the locations of all the atoms and valence electrons

Lewis structure

An elements _________ describes how strongly atoms of that element pull on lectrons in chemical bonds

Electronegativity

A charge less than that of a proton or electron

Partial charge

Has opposite partial charges on opposite ends of the molecule

Polar molecule

Consists of atoms covalently bonded into a larger structures that do not contain a specific number of atoms

Covalent networks

The simplest ratio of atoms in a covalent network is a

Formula unit

The mass of a formula unit

Formula mass

Atoms that gain electrons become

Anions

Atoms that lose electrons become

Cations

The attractions between the oppositely charged ions forms an

Ionic bond

The bonding in metals

Metallic bonding

Combinations of chemical symbols and numbers showing the type and number of atoms in each compound

Chemical formulas

The ability of one substance to dissolve in another substance is its

Solubility

The ________ of a solution is a measure of how much solute is dissolved in a given amount of solvent or in a given amount of solution.

Concentration

The defined unit

Mole

Is a measure of solution concentration as moles of solute per some volume of sollution

Molarity

Concentration measured as the moles of solute in a given mass of solvent is

Molality

The process of mixing molecules of one substance with another substance by random molecular motion

Diffusion

A chemical change resulting from a collision between atoms or molecules is a

Chemical reaction

The original substances that undergo a chemical reaction are called

Reactants

The new substances produced by the reaction are called

Products

An expression that uses chemical symbols to represent a chemical reaction is called a

Chemical equation

In a chemical equation the number before each chemical formula is called the

Coefficient

An ordinary chemical reaction cannot form or destroy atoms

Law of conservation of mass

A chemical equation that has the same number of atoms of each element on each side of the arrow is said to be

Balanced