Question | Answer |
Law of Conservation of Mass | "Mass can neither be created nor destroyed, just changed (in form)." |
Physical Change | changes affecting the form and physical characteristics of a substance |
Chemical Change | changes affecting the chemical composition and/or chemical properties of a substance |
Element | a pure substance and the simplest form of matter |
Chemical Formula | a way of expressing information about the atoms the make up a particular chemical compound |
Element Molecule | molecules made up of a single type of element |
Diatomic Molecule | molecules made up of two of a single type of element |
Compound Molecule | molecules made up of two or more kinds of elements |
Chemical Equation | symbolic representation of a chemical reaction |
Chemical Reaction | process leading to the transformation of one set of chemical substances to another |
Reactants | substances involved in a chemical reaction as the substances going through the change |
Products | substances involved in a chemical reaction as the substance formed by the change |
Coefficient | number in front of a term in a chemical equation that indicates how many molecules take part in the reaction |
Subscript | number below an atomic symbol that indicates how many atoms there are of an element in a molecule |
Ionic Compound | chemical compound (molecule) in which ions are held together by ionic bonds |
Covalent Compound | compound in which atoms share pairs of electrons |
Metallic Compound | compound containing one or more transition elements |
Synthesis | deliberate execution of chemical reactions to get one or more product(s) |
Decomposition | separation of a chemical compound into elements or simpler compounds |
Single Replacement | chemical reaction in which an element or ion moves out of one compound and into another |
Double Replacement | chemical process involving exchange of bonds between two reacting chemical species |