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Chapters 2

Introduction to Matter

matter anything that has mass and takes up space
chemistry the study of the properties of matter and how matter changes
substance a single kind of matter that is pure, it always has a specific makeup
physical property a characteristic of a pure substance that can be observed without changing it to another substance
chemical property a characteristic of a pure substance that describes its ability to change into different substances
element a pure substance that cannot be broken down into any other simpler substance by chemical of physical means
atom the basic particle from which all elements are made
chemical bond a force of attraction between two atoms
molecule formed when atoms combine to make larger particles
compound a pure substance made of two or more elements chemically combined in a set ratio
chemical formula shows the elements in the compound and the ratio of atoms
mixture made of two or more substances that are together in the same place but are not chemically combined
heterogeneous mixture a mixture in which you can see the different parts
homogeneous mixture so evenly mixed that you can’t see the different parts
solution made up of a solute and a solvent
weight a measure of the force of gravity on an object
mass the measurement of the amount of matter in an object
International System of Units a universal system of metric units
volume the amount of space that matter occupies
density relates to the amount of mass of a material in a given volume
physical change any change that alters the form or appearance of matter but does not create a new substance
chemical change a change in matter that produces one or more new substances
law of conservation of mass the fact that matter is neither created nor destroyed in any chemical or physical change
energy the ability to do work or cause change
temperature a measure of the average energy of random motion of particles of matter
thermal energy the total energy of all the particles in an object
endothermic energy a change in which energy is taken in
exothermic energy reaction that releases energy
kinetic energy the energy of matter in motion
potential energy stored energy an object has because of its position
chemical energy the internal energy stored in the chemical bonds between atoms
electromagnetic energy a form of energy that travels through space as waves
electrical energy the energy of electrically charged particles moving from one place to another
electrode two metal strips attached to wires that are placed inside a solution as part of the electrolysis process
Created by: KerriReynolds