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vocab science

QuestionAnswer
Law of Conservation of Mass The mass of the products of a chemical reaction must be the same as the mass of the rectants in that reaction.
Physical Change change in the physical properties of a substance, as size or shape
Chemical Change irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance
Element one of a class of substances that cannot be separated into simpler substances by chemical means.
Chemical Formula a representation of a substance using symbols for its constituent elements
Element (diatomic) Molecule Diatomic molecules are molecules composed only of two atoms, of either the same or different chemical elements.
Compound Molecule A chemical compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions
Chemical Equation A chemical equation is the symbolic representation of a chemical reaction where the reactant entities are given on the left hand side and the product entities on the right hand side
Chemical Reaction. A chemical reaction is a process that leads to the transformation of one set of chemical substances to another
Reactions (in a chemical equation) the reactant entities are given on the left hand side and the product entities on the right hand side
Products (in a chemical equation) In a chemical reaction, substances (elements and/or compounds) called reactants are changed into other substances (compounds and/or elements) called products
cofficient (in a chemical equation) In writing chemical equations, the number in front of the molecule's symbol (called a coefficient) indicates the number of molecules participating in the reaction.
Subscript (in a chemical equation) The subscripts tell you how many atoms of each element are in the equation
Created by: l0403670
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