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hibas science vocab

QuestionAnswer
laws of conservation of mass the mass of an isolated system will remain constant over time
physical change a usually reversible change in the physical properties of a substance
chemical change a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition
element (diatomic) molecule are molecules composed only of two atoms
compound molecule when 2 or more atoms are chemically combined
chemical equations shorthand form of writing what reactants are used and what products are formed in a chemical reaction
chemical reaction process that produces chemical change, creating a new substance that have different properties
reactants (in a chemical equation) substances that go through a chemical change
products (in a chemical equation) substances that result from a chemical change
coefficient (in a chemical equation) tells the number of molecules
subscript (in a chemical equation) tells the number of a certain type of atom in one molecule
chemical formula a representation of a substance using symbols for its constituent elements
element substances that can not be broken down into smaller substances
Created by: r0302966
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