HESI A2 Chemistry Study Guide Questions
With Correct Answers
What is the structure of the periodic table?☑️Correct Ans-A series of rows called periods, and
columns called groups.
What can be predicted by the group an element occupies?☑️Correct Ans-Charge and the
numbers of electrons in its outer shell.
What is the name and properties of group VIII of the periodic table?☑️Correct Ans-Noble
gases.
They tend to remain neutral in most situations, because their outer orbits are complete.
What is the atomic number?☑️Correct Ans-The number of protons in the nucleus, defines an
atom of a particular element.
What is the atomic mass?☑️Correct Ans-The average mass of an element's isotopes.
What are isotopes?☑️Correct Ans-Different kinds of the same atom that vary in weight.
What is a compound?☑️Correct Ans-The combination of different elements.
What do chemical reactions resemble?☑️Correct Ans-A cooking recipe.
What are the reactants in a chemical reaction?☑️Correct Ans-The ingredients of a chemical
reaction.
What is the term given to the results of a chemical reaction?☑️Correct Ans-The products.
, Why must a chemical equation be balanced at the end of a reaction?☑️Correct Ans-Because the
law of conservation of mass indicates that mass cannot be created nor destroyed in a chemical
reaction.
What are equilibrium reactions?☑️Correct Ans-Chemical reactions that stop before all the
reactants are used to make the products.
What makes an atom's physical structure?☑️Correct Ans-A nucleus and orbits(sometimes
known as electron clouds)
What composes the center of the atom?☑️Correct Ans-Protons and neutrons
What spins in the orbits of an atom?☑️Correct Ans-Electrons
What are the energy levels of the atom called?☑️Correct Ans-Shells or orbits
What is the term used to define an atom that is electrically charged?☑️Correct Ans-Ionic state.
What is a cation?☑️Correct Ans-An atom with a positive charge
What is anion?☑️Correct Ans-An atom with a negative charge
What causes equilibrium?☑️Correct Ans-The state in which reactants are forming products at
the same rate that products are forming reactants.
What are the four basic ways to increase the reaction rate?☑️Correct Ans-Increase temperature
Increase the surface area of the reactants
Add a catalyst
Increase the concentration of the reactants.
With Correct Answers
What is the structure of the periodic table?☑️Correct Ans-A series of rows called periods, and
columns called groups.
What can be predicted by the group an element occupies?☑️Correct Ans-Charge and the
numbers of electrons in its outer shell.
What is the name and properties of group VIII of the periodic table?☑️Correct Ans-Noble
gases.
They tend to remain neutral in most situations, because their outer orbits are complete.
What is the atomic number?☑️Correct Ans-The number of protons in the nucleus, defines an
atom of a particular element.
What is the atomic mass?☑️Correct Ans-The average mass of an element's isotopes.
What are isotopes?☑️Correct Ans-Different kinds of the same atom that vary in weight.
What is a compound?☑️Correct Ans-The combination of different elements.
What do chemical reactions resemble?☑️Correct Ans-A cooking recipe.
What are the reactants in a chemical reaction?☑️Correct Ans-The ingredients of a chemical
reaction.
What is the term given to the results of a chemical reaction?☑️Correct Ans-The products.
, Why must a chemical equation be balanced at the end of a reaction?☑️Correct Ans-Because the
law of conservation of mass indicates that mass cannot be created nor destroyed in a chemical
reaction.
What are equilibrium reactions?☑️Correct Ans-Chemical reactions that stop before all the
reactants are used to make the products.
What makes an atom's physical structure?☑️Correct Ans-A nucleus and orbits(sometimes
known as electron clouds)
What composes the center of the atom?☑️Correct Ans-Protons and neutrons
What spins in the orbits of an atom?☑️Correct Ans-Electrons
What are the energy levels of the atom called?☑️Correct Ans-Shells or orbits
What is the term used to define an atom that is electrically charged?☑️Correct Ans-Ionic state.
What is a cation?☑️Correct Ans-An atom with a positive charge
What is anion?☑️Correct Ans-An atom with a negative charge
What causes equilibrium?☑️Correct Ans-The state in which reactants are forming products at
the same rate that products are forming reactants.
What are the four basic ways to increase the reaction rate?☑️Correct Ans-Increase temperature
Increase the surface area of the reactants
Add a catalyst
Increase the concentration of the reactants.
