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Atoms and moles

vocab words from p.73-88

TermDefinition
law of definite proportions states that 2 samples of a given compound are made of the same elements in exactly the same proportions by mass regardless of the sizes or sources of the samples
law of conservation of mass the mass of the reactants in a reaction = the mass of the products
law of multiple proportions if 2 or more different compounds are composed of the same 2 elements
electron a subatomic particle that has a negative charge
nucleus in physical science, an atom's central region, which is up of protons and nutrons
proton a subatomic particle that has a positive charg and that is found in the nucleus of the atom
neutron a subatomic particle that has no charge
atomic number the number of protons in the nucleus of an atom; the atomic number is the sames for all atoms of an element
mass number the sum of the numbers of protons and neutrons in the and that is found in the nucleus of an atom
isotope atoms of the same element that have different numbers of neutrons
Created by: pergasha15
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