Chapters 1-3 Review Game

Compound

A substance made of two or more elements chemically combined in a specific ratio, or proportion.

coefficients

You can balance a chemical change by changing the

physical changeA change that alters the form or appearance of a material but does not make the material into another substance.

ElementA substance that cannot be broken down into any other substances by chemical or physical means.

chemical reactionThe process in which substances undergo chemical changes that results in the formation of new substances.

pH scale shows concentration of hydrogen ions in a solution

chemical change A change in matter that produces a new substance.

solubilityMeasure of how much solute can dissolve in a solvent at a given temperature

Solution

A well-mixed mixture.

mixtureTwo or more substances that are mixed together but not chemically combined.

Moleculecombination of two or more atoms.

Chemical formula

A combination of the symbols that represent the elements in a compound.

chemical change A change in matter that produces a new substance.

Chemical Bond

The force that holds atoms together.

Atom

smallest particle of an element.

Chemical Symbol

A one or two letter set of characters that is used to identify elements.

Precipitate

A solid that forms from a solution during a chemical reaction.

Chemical Equation

A short, easy way to show chemical reactions, using symbols instead of words.

neutralizationReaction between an acid and a base producing water and a salt

Unsaturated

If you can continue to dissolve more solute in a solution, you have a(n) ________ solution.

Conservation of mass

The principle stating that matter is not created or destroyed during a chemical reaction.

Chemistry

The study of the properties of matter and how matter changes.

solute The part of a solution that is present in the smaller amount

Subscript H20A number in a chemical

formula that tells the number of the atoms in a molecule or the ratio of the elements in a compound.

suspension

mixture in which particles can be seen & easily separated by settling or filtration

Covalent bondChemical bond formed when two atoms share electrons

SynthesisA chemical reaction in which two or more simple substances combine to form a new, more complex substance.

ProductsA substance formed as a result of a chemical reaction.

Reactants

A substance that enters into a chemical reaction.

CoefficientA number in front of a

chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.

ConcentrationThe amount of one material in a volume of another material.

Activation energy

The minimum amount of energy that has to be added to get a chemical reaction started.

Replacement reaction

A reaction in which one element replaces another in a compound; or when two elements in different compounds trade places.

IndicatorA compound that changes

color when it comes in contact with an acid or a base

Exothermic reaction

A reaction that releases energy in the form of heat.

decompositionA chemical reaction that breaks down compounds into simpler products.

EnzymeA biological catalyst that lowers the activation energy of reactions in cells.

Endothermic reaction

A reaction that absorbs energy in the form of heat.

Solvent

The part of a solution that is present in the larger amount.

FuelA material that releases energy when it burns.

Base #8-14 on the pH scale

Concentrated solution A mixture that has a lot of solute dissolved in it.

Solution

A very well mixed mixture.

fire prevention best form of fire safety

acid A substance that turns blue litmus paper red.

Acid A substance that turns blue litmus paper red.

Inhibitor

A material that decreases the rate of a chemical reaction.

base Feels slippery

IndicatorA compound that changes

color when it comes in contact with an acid or a base

salt Any ionic compound made from the neutralization of an acid with a base.

neutral 7 on the pH scale

atomic numbernumber of protons in the nucleus of an atom

Acid #0-6 on the pH scale

catalystA material that increases the rate of a chemical reaction by lowering the activation energy.

alloyMaterial made of 2 or more elements that has the properties of a metal

matterAnything that has mass and takes up space

Acid Tastes sour

Alkali metals Group 1

1. lower freezing point of solvent

2. raise boiling point of solvent

2 effects of solutes on solutions

period row across the periodic table

Fuel, oxygen, heat

3 parts of the fire triangle

Noble gases Group 18

CombustionA rapid reaction between oxygen and fuel that results in fire.

Base A substance that turns red litmus paper blue.

Base Tastes bitter

digestion Process that breaks down complex molecules of food into smaller particles

group (or family)

column on the periodic table

halogens

Group 17

malleableproperty that metal can be rolled into thin sheets or shapes

colloid mixture containing small, undissolved particles that do not settle out - particles large enough to scatter a beam of light

Dilute solution Mixture that has only a little solute

corrosive Eat away at other materials

ductileproperty that metal can be pulled into wire

hydrogen Element with 1 valence electron

Base A substance that turns red litmus paper blue.

Formation of a new substance Best evidence for a chemical reaction