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Science Vocab

What is Diatomic? Diatomic molecules are molecules composed only of two atoms, of either the same or different chemical elements.
What is Law of Conservation of mass? Law of Conservation of Mass is a relation stating that in a chemical reaction, the mass of the products equals the mass of the reactants.
What is physical change? a change from one state (solid or liquid or gas) to another without a change in chemical composition
What is chemical change? Chemical changes happen on a molecular level when you have two or more molecules that interact and create a new molecule or two
What is an element? substance that cannot be broken down into simpler substances
What is a chemical formula? a representation of a substance using symbols for its constituent elements.
What is a element molecule? molecule made up of one type of atom
What is a chemical equation? shorthand form for writing what reactants are used and what reactants are used and what products are formed in a chemical reaction; sometimes shows whether energy is produced or absorbed
What is a chemical reaction? process that produces chemical change resulting in new substances that have properties different from those of the orginal substances
What are reactants (in a chemical equation)? substance that exists before a chemical reaction begins
What are products (in a chemical equation)? substance that forms as a results of a chemical reaction
What is a coefficient? (in a chemical equation) tells the number of molecules.
What is a subscript? (in a chemical equation) tells the number of certain types of atom in one molecule
What is a compound molecule? molecules made of more than one type of atom
Created by: s0407770