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matter anything that takes up space and has mass
chemistry the study of the properties of matter and how matter changes
substance a single kind of matter that is pure
physical property a characteristic that can be observed without changing the substance into something else
chemical property a characteristic that is observed when a substance interacts with another substance
element a sustance where all atoms are the same
atom the smallest unit of an element that retains the property of the element
proton positively charged particles in the nucleus of an atom
electron negatively charged particles that spin around the nucleus
nutrons particles with no charge in the nucleus
nucleus the heavy center part of an atom that contains the protons and neutrons
electromagnetic force the force that holds the electrons in orbit
electron cloud the space around the atom in which the electrons move
chemical symbol the letters representing an elemenet
atomic number the number of protons in an element
atomic mass (weight) the number of protons plus neutrons in an atom
chemical formula a shorthand of the element symbols used to represent a compound or molecule
compound two or more different atoms of elements chemically bound
chemical bond the powerful electrical force that holds 2 atoms together
molecule two or more atoms chemically bonded
physical change a change that alters the form or appearance of a material but does not change into another substance
chemical change when atoms break their bonds to form a new substance
Created by: sharon_eberle1