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wgu - mod 7 science

ISA4/ISC4

QuestionAnswer
The smallest particle of an element tht has all of the element's chemical properties. atoms
an elementary or composite particle smaller than an atom. subatomic particles
a group of atoms held tightly together by covalent bonds. molecules
different forms of an element whose atoms contain the same number of protons but different numbers of neutrons. isotopes
any material that is made up of only one type of atom elements
the attraction between two atoms that holds them together in a compound. chemical bonds
a chart in which all known elements are listed in order of atomic number periodic table
the mass of a closed system wil remain constant, regardless of the processes acting inside the system. conservation of mass
the total amount of energy is an isolated system remains constant. a consequence of this law is that energy cannot be created or destroyed conservation of energy
a chemical change chemical reactions
the standard unit of atomic mass, which is equal to one-twelfth the mass of the common atom of carbon, arbitrarily given the value of exactly 12. atomic mass unit (amu)
the process whereby a reactant loses one or more electrons. oxidation
the process whereby a reactant gains one or more electrons reduction
a substance that increases the rate of a chemical reaction by lowering its activation energy catalyst
a substance that donates hydrogen ions acid
a substance that accepts hydrogen ions base
matter that has a definite volume and a definite shape solid
matter that has a definite volume but no definite shape, assuming the shape of its container liquid
matter that has neither a definite volume nore a definite shape, always filling any space available to it. gas
Created by: 1017560862
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