HESI A2 2026 Chemistry Practice
Questions
What does increasing temperaturezcausezinzazchemicalzreaction?z-zAnswer-
Thezparticleszhavezgreaterzkineticzenergy,zincreasingzthezspeedzatzwhichztheyzmovezaround,zandz
thezchancezofzcollisionzbetweenzparticles.
Whatzspinszinzthezorbitszofzanzatom?z-zAnswer-Electrons
Whatzdozchemicalzreactionszresemble?z-zAnswer-Azcookingzrecipe.
Whatzarezthezenergyzlevelszofzthezatomzcalled?z-zAnswer-Shellszorzorbits
Whatzisztheztermzusedztozdefinezanzatomzthatziszelectricallyzcharged?z-zAnswer-Ioniczstate.
Whatziszazcation?z-zAnswer-Anzatomzwithzazpositivezcharge
Whatziszanion?z-zAnswer-Anzatomzwithzaznegativezcharge
Whatziszthezstructurezofzthezperiodicztable?z-zAnswer-
Azserieszofzrowszcalledzperiods,zandzcolumnszcalledzgroups.
Whatzcanzbezpredictedzbyzthezgroupzanzelementzoccupies?z-zAnswer-
Chargezandztheznumberszofzelectronszinzitszouterzshell.
WhatzisztheznamezandzpropertieszofzgroupzVIIIzofzthezperiodicztable?z-zAnswer-Noblezgases.
Theyztendztozremainzneutralzinzmostzsituations,zbecauseztheirzouterzorbitszarezcomplete.
, Whatziszthezatomicznumber?z-zAnswer-
Theznumberzofzprotonszinztheznucleus,zdefineszanzatomzofzazparticularzelement.
Whatzcomposeszthezcenterzofzthezatom?z-zAnswer-Protonszandzneutrons
Whatziszthezatomiczmass?z-zAnswer-Thezaveragezmasszofzanzelement'szisotopes.
Whatzarezisotopes?z-zAnswer-Differentzkindszofzthezsamezatomzthatzvaryzinzweight.
Whatziszazcompound?z-zAnswer-Thezcombinationzofzdifferentzelements.
Whatzarezthezreactantszinzazchemicalzreaction?z-zAnswer-Thezingredientszofzazchemicalzreaction.
Whatzisztheztermzgivenztozthezresultszofzazchemicalzreaction?z-zAnswer-Thezproducts.
Whyzmustzazchemicalzequationzbezbalancedzatzthezendzofzazreaction?z-zAnswer-
Becausezthezlawzofzconservationzofzmasszindicateszthatzmasszcannotzbezcreatedznorzdestroyedzin
zazchemicalzreaction.
Whatzmakeszanzatom'szphysicalzstructure?z-zAnswer-
Aznucleuszandzorbits(sometimeszknownzaszelectronzclouds)
Whatzarezequilibriumzreactions?z-zAnswer-
Chemicalzreactionszthatzstopzbeforezallzthezreactantszarezusedztozmakezthezproducts.
Whatzcauseszequilibrium?z-zAnswer-
Thezstatezinzwhichzreactantszarezformingzproductszatzthezsamezratezthatzproductszarezformingzrea
ctants.
Whatzarezthezfourzbasiczwaysztozincreasezthezreactionzrate?z-zAnswer-Increaseztemperature
Increasezthezsurfacezareazofzthezreactantsz
Questions
What does increasing temperaturezcausezinzazchemicalzreaction?z-zAnswer-
Thezparticleszhavezgreaterzkineticzenergy,zincreasingzthezspeedzatzwhichztheyzmovezaround,zandz
thezchancezofzcollisionzbetweenzparticles.
Whatzspinszinzthezorbitszofzanzatom?z-zAnswer-Electrons
Whatzdozchemicalzreactionszresemble?z-zAnswer-Azcookingzrecipe.
Whatzarezthezenergyzlevelszofzthezatomzcalled?z-zAnswer-Shellszorzorbits
Whatzisztheztermzusedztozdefinezanzatomzthatziszelectricallyzcharged?z-zAnswer-Ioniczstate.
Whatziszazcation?z-zAnswer-Anzatomzwithzazpositivezcharge
Whatziszanion?z-zAnswer-Anzatomzwithzaznegativezcharge
Whatziszthezstructurezofzthezperiodicztable?z-zAnswer-
Azserieszofzrowszcalledzperiods,zandzcolumnszcalledzgroups.
Whatzcanzbezpredictedzbyzthezgroupzanzelementzoccupies?z-zAnswer-
Chargezandztheznumberszofzelectronszinzitszouterzshell.
WhatzisztheznamezandzpropertieszofzgroupzVIIIzofzthezperiodicztable?z-zAnswer-Noblezgases.
Theyztendztozremainzneutralzinzmostzsituations,zbecauseztheirzouterzorbitszarezcomplete.
, Whatziszthezatomicznumber?z-zAnswer-
Theznumberzofzprotonszinztheznucleus,zdefineszanzatomzofzazparticularzelement.
Whatzcomposeszthezcenterzofzthezatom?z-zAnswer-Protonszandzneutrons
Whatziszthezatomiczmass?z-zAnswer-Thezaveragezmasszofzanzelement'szisotopes.
Whatzarezisotopes?z-zAnswer-Differentzkindszofzthezsamezatomzthatzvaryzinzweight.
Whatziszazcompound?z-zAnswer-Thezcombinationzofzdifferentzelements.
Whatzarezthezreactantszinzazchemicalzreaction?z-zAnswer-Thezingredientszofzazchemicalzreaction.
Whatzisztheztermzgivenztozthezresultszofzazchemicalzreaction?z-zAnswer-Thezproducts.
Whyzmustzazchemicalzequationzbezbalancedzatzthezendzofzazreaction?z-zAnswer-
Becausezthezlawzofzconservationzofzmasszindicateszthatzmasszcannotzbezcreatedznorzdestroyedzin
zazchemicalzreaction.
Whatzmakeszanzatom'szphysicalzstructure?z-zAnswer-
Aznucleuszandzorbits(sometimeszknownzaszelectronzclouds)
Whatzarezequilibriumzreactions?z-zAnswer-
Chemicalzreactionszthatzstopzbeforezallzthezreactantszarezusedztozmakezthezproducts.
Whatzcauseszequilibrium?z-zAnswer-
Thezstatezinzwhichzreactantszarezformingzproductszatzthezsamezratezthatzproductszarezformingzrea
ctants.
Whatzarezthezfourzbasiczwaysztozincreasezthezreactionzrate?z-zAnswer-Increaseztemperature
Increasezthezsurfacezareazofzthezreactantsz
