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RSM Chp. Two

TermDefinition
matter is anything that has mass and takes up space
substance is a single kind of matter that is pure, meaning it always has a specific makeup or composition and a specific set of properties.
physical property is a characteristic of a pure substance that be observed without changing it into another substance
chemical property is a characteristic of a pure substance that describes its ability to change into different substances
element is a pure substance that cannot be broken down into any other substances by chemical or physical means
atom is the basic particle from which all elements are made
chemical bond when atoms combine the force of attraction between two atoms
molecule when atoms combine to form larger particles of two more atoms held together by chemical bonds.
compound is a pure substance made of two or more elements chemically combined in a set ration
chemical formula representation of a compound showing the elements and their ratio
mixture is made of two or more substance that are together in the same place but NOT chemically combined.
heterogeneous mixture you can see the different parts or substances
homogeneous mixture substances are evenly mixed that you cannot see the different parts
solution is a homogeneous mixture and does not have to be a liquid. It can be a gas (AIR) or solid (brass)
physical change is any change that alters the form or appearance or matter but does not make any substance in the matter into a difference substance
chemical change a change in matter that produces one or more new substances, sometimes called chemical reaction
law of conservation of matter that matter is not created or destroyed in any chemical or physical change sometimes called the Law of Conservation of Mass
energy temperature is the ability to do work or cause change. Every chemical and physical change in matter includes a change in energy
thermal energy is the total energy of all of the particles in an object.
endothermic change change in which energy is taken in
exothermic change change in which energy is given off or released
chemical energy the energy stored in the chemical bonds between atoms is a form of energy.
electromagnetic energy a form of energy that travels through space as waves
electrical energy is the energy of electrically charged particles moving from one place to another
electrode used in electrolysis are the two metal strips are placed in a solution not touching one another for an electric current to flow through solution.
temperature is measure of average energy of random motion of particles of matter
Created by: gayledains