Anything that has mass and takes up space.
The study of matter and how matter changes.
A single kind of matter that is pure, always has the same makeup or composition.
A substance that cannot be broken down into any other substance by physical or chemical means.
Basic particle from which all elements are made.
The force of attraction between two atoms.
A group of two or more atoms held together by chemical bonds.
A substance made of two or more elements chemically combined in a set ratio.
Shows the elements in a compound and the ratio of atoms.
Two or more substances together in the same place, but there is no chemical bond between them.
You can see the different parts and they can be separated.
The substances are so evenly mixed you cannot see the different parts.
Has a definite shape and a definite volume.
The particles are in a regular repeating pattern and create crystals. Salt, sugar and snow are crystalline solids.
The particles are not in a regular pattern and these solids do not melt at a distinct temperature.
Definite volume but no definite shape.
A substance that flows.
An inward force in liquid particles that brings particles near the surface closer together.
A liquids resistance to flowing.
No definite shape, no definite volume.
Gas particles pushing on the walls of the container.
The average kinetic energy of the particles in a substance, which is a measure of how hot or cold something is.
Total kinetic and potential energy of the particles in an object.
The transfer of thermal energy from a warm object to a cooler object.
A characteristic of a substance that can be observed without changing it into another substance.
Change from a solid to a liquid.
The specific temperatute melting occurs in a pure crystalline solid.
Change from a liquid to a solid.
Change from a liquid to a gas.
Vaporization that only takes place on the surface of a liquid.
Vaporization that takes place both below and at the surface of a liquid.
The temperature at which a liquid boils.
Change from a gas to a liquid.
Surface particles of a solid gain enough energy to form a gas. Dry ice is an example.
When the appearance or form of a substance changes but no new substance is produced.
A change that produces one or more new substances.
Property of a substance making it possible to hammer or shape the substance into sheets.
Property of a substance making it possible to draw the substance into thin wire.
Chemical reaction which results in the release of thermal energy.
Chemical reaction which results in the absorption of thermal energy.
the average mass of all the isotopes of that element.
An arrangement of elements showing the repeating pattern of their properties
The center of the atom-contains protons and neutrons.
Positively charged particles in the nucleus of an atom.
Particles of neutral charge in the nucleus of the atom.
Negatively charged particles moving around outside the nucleus of the atom.
Number of protons in an element.
One or two letter symbols representing an element.
Horizontal rows on the periodic table.
Vertical columns on the periodic table.
Good conductors of electricity and heat, often shiny and bendable.
Shiny and reflective.
The ability of an object to transfer heat.
The ability of an object to carry electric current.
The ease and speed with which an element combines or reacts with something.
The deterioration of metal because of a chemical reaction.
The most reactive metals, so reactive they can only be found in nature as compounds (combined with other things). They are the metals of group 1.
Alkaline Earth Metals
Harder and denser than group 1 metals and melt at higher temps. They are the metals of group 2.
The elements in groups 3 through 12. Most of these are hard and shiny and include iron, copper, nickel, gold and silver.
First row of the two periods at the bottom of the table beginning with Lanthanum. Lanthanides are shiny reactive metals.
Second row of the two periods at the bottom of the table beginning with Actinium. These are radioactive, unstable elements.
Elements following uranium on the periodic table. These elements are made when nuclear particles collide.
An element lacking the properties of a metal.
Molecule made up of two atoms.
The Group 17 nonmetals, fluorine(F), chlorine(Cl), Bromine(Br), Iodine(I). The word halogen means "salt-forming".
The Group 18 elements.
Have some properties of metals and some properties of nonmetals. On the periodic table they are located between the metals and nonmetals.
Substances that can conduct electric current under some conditions but not under other conditions.
The specific amount of energy an electron has.
Atoms with same number of protons but different number of neutrons.
Sum of protons and neutrons in the atom.
Electrons in the highest (outer) energy level.
Electron Dot Diagram
Symbol for the element surrounded by dots representing the valence electrons.
Force of attraction holding atoms together.
An atom or group of atoms with an electric charge.
Force of attraction between oppositely charged particles.
Made up of positive and negatively charged particles with an overall neutral charge.
Group of symbols showing the ratio of elements in a compound.
The number following a chemical symbol that tells the ratio od elements in a compound.
Chemical bond when two atoms share electrons.
Compound made up of molecules.
A covalent bond in which electrons are shared equally.
A covalent bond in which electrons are shared unequally.
Attraction between a positive metal ion and the electrons surrounding it.
An orderly three dimensional arrangementbof ions.
Compounds that react with metals, taste sour and turn blue litmus paper red. Below 7 on the pH scale.
Compounds that taste bitter, feel slippery and turn red litmus paper blue. Above 7 on the pH scale.
A compound that changes color when it comes in contact with an acid or base.
Potential to attract hydrogen.
Reaction between an acid and a base, forming a salt.
An ionic compound formed from the positive ion of a base and the negative ion of an acid.
The substances that undergo a chemical change.
The new substances formed from chemical changes.
Law of Conservation of Mass
Matter is neither created or destroyed but simply changes form.
A solid that forms from liquids during a chemical reaction.
The use of symbols to show a chemical reaction.
A number placed in front of a formula in a chemical equation.
Minimum amount of energy needed to start a chemical reaction.
Amount of substance in a given volume.
Increases the rate of reaction.
Decreases the rate of reaction.
A biological catalyst.