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Elements & Molecules
Molecules, atoms, and chemical equations
Question | Answer |
---|---|
Law of Conservation of Mass | A law that states that mass can neither created nor destroyed |
Physical Change | A change that affects the form of a chemical substance but doesn't change the chemical composition for that substance |
Chemical Change | A change that occurs when a certain substance is formed into an another substance by a chemical reaction |
Element | The chemically simplest substance that cannot be broken down any further |
Chemical Formula | A way of expressing information about the atoms that constitute a particular chemical compound |
Element (Diatomic) Molecule | Molecules composed only of two atoms, of either the same or different chemical elements |
Compound Molecule | Group of two or more elements that are bonded together |
Chemical Equation | A 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 process that leads to the transformation of one set of chemical substances to another |
Reactants | Substances such as compounds and elements that are combined to create a product |
Products | The result of substances changing into different substances |
Coefficient | A numerical measure of a physical or chemical property that is constant for a system under specified conditions |
Subscript | Placed to the lower right of the element's symbol, this shows the number of atoms of an element in a molecule |