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Unit 3 Vocabulary

TermDefinition
proton positively charged particle in the nucleus of an atom
neutron neutral particle in the nucleus of an atom
electron particle with negative charge
electron cloud area around nucleus where electrons can be foudn
nucleus positively charged, central part of the atom
atomic number number of protons
isotope same element with different number of neutrons
average atomic mass average mass of an element's isotopes
periodic table chart of elements arranged into rows and periods based on physical and chemical properties
ionic bond gain or loss of electrons
covalent bond sharing of electrons
ion atom that is no longer neutral, it is either positive or negative
compound substance made of 2 or more elements
exothermic reaction chemical reaction that releases thermal energy
endothermic reaction chemical reaction that absorbs thermal energy
rate of reaction speed at which a chemical reaction occurs
catalyst substance that speeds up a chemical reaction
Created by: lindsaystagg123
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