HESI-A2 CHEMISTRY Chemistry note cards for HESI entrance exam

HESI-A2 CHEMISTRY Chemistry note cards for HESI entrance exam Question Answer Matter that has a definite shape and volume solid Matter that changes in volume with changes in temperature and pressure gas A ____________ change of matter is when no change is made to the chemical composition of a substance. physical Simplest of substances and is represented by a letter or letters element Law that states matter can neither be created nor destroyed during a chemical reaction Law of conservation of mass The breaking of bonds and reforming of new bonds to create new chemical compounds with different chemical formulas and different chemical properties Chemical reaction 5 main chemical reactions synthesis, decomposition, combustion, single replacement, double replacement Chemical reaction in which 2 elements combine to form a product synthesis Chemical reaction that is the breaking of a compound into component parts decomposition This study source was downloaded by from CourseH on :33:38 GMT -05:00 The chemical reaction that is the reaction of a compound with oxygen combustion Chemical reaction that consists of an active metal reaction with an ionic compound creating a new compound single replacement Chemical reaction involving 2 ionic compounds; the reactant yields "switched partners" double replacement how elements are arranged on the periodic table by their chemical properties Number that represents the # of protons an element has atomic number average of the masses of each of its isotopes as they occur in nature atomic mass Mass number - atomic number = ____________ # of neutrons in an element Columns of the periodic table = ________ groups Rows of the periodic table = ___________ periods Group IA = _____ charge +1 Group IIA = ______ charge