Unit 4 End of Unit Assignment

Multiple Choice

we watched fireworks explode on the 4th of July

• Physical Change (PC)

• Chemical Change (CC)

Multiple Choice

the ice cube in my glass melted

• Physical Change (PC)

• Chemical Change (CC)

Multiple Choice

the chemist crushed a solid cube of potassium bromide into a fine powder

• Physical Change (PC)

• Chemical Change (CC)

Multiple Choice

my grandmother cooked eggs for breakfast

• Physical Change (PC)

• Chemical Change (CC)

Multiple Choice

the student dissolved NaCl in water by stirring

• Physical Change (PC)

• Chemical Change (CC)

Multiple Choice

vinegar and baking soda react and produce a gas, which is evident in the rapid formation of bubbles

• Physical Change (PC)

• Chemical Change (CC)

Multiple Choice

the steel nail rusted

• Physical Change (PC)

• Chemical Change (CC)

Multiple Choice

sugar dissolves better in warm water than cold water

• Physical Change (PC)

• Chemical Change (CC)

Multiple Choice

the teacher heated a beaker of water until it boiled

• Physical Change (PC)

• Chemical Change (CC)

Multiple Choice

the scientist mixed two liquid solutions, and a solid formed

• Physical Change (PC)

• Chemical Change (CC)

Multiple Choice

the reaction between lithium and water resulted in a temperature increase of 25^oC

• Physical Change (PC)

• Chemical Change (CC)

Check and correct your paper.

Multiple Select

Analyze the data table, and determine the change in temperature, and decide the reaction if endothermic or exothermic.

• increase by 9^oC

• decrease by 9^oC

• endothermic

• exothermic

Multiple Select

Analyze the data table, and determine the change in temperature, and decide the reaction if endothermic or exothermic.

• increase by 65^oC

• decrease by 65^oC

• endothermic

• exothermic

Multiple Select

Analyze the data table, and determine the change in temperature, and decide the reaction if endothermic or exothermic.

• increase by 3^oC

• decrease by 3^oC

• endothermic

• exothermic

Check and correct your paper.

Multiple Select

Analyze the diagram of a CO₂ molecule. Select the true statements.

• Electrons are shared.

• Electrons are transferred.

• The bond is ionic.

• The bond is covalent.

Multiple Select

Analyze the diagram of a NaCl molecule. Select the true statements.

• Electrons are shared.

• Electrons are transferred.

• The bond is ionic.

• The bond is covalent.

Check and correct your paper.

Check and correct your paper.

Multiple Choice

a metal bonding with a nonmetal

• covalent

• ionic

Multiple Choice

a nonmetal bonding with another nonmetal

• covalent

• ionic

Multiple Choice

low melting and boiling points

• covalent

• ionic

Multiple Choice

electrons shared between elements

• covalent

• ionic

Multiple Choice

poor conductor of heat and electricity

• covalent

• ionic

Multiple Choice

electrons transferred from one molecule to another

• covalent

• ionic

Multiple Choice

Is H₂O a covalent or ionic bond.

• covalent

• ionic

Multiple Choice

Is CH₄ a covalent or ionic bond.

• covalent

• ionic

Multiple Choice

Is KCl a covalent or ionic bond.

• covalent

• ionic

Multiple Choice

Is BaO a covalent or ionic bond.

• covalent

• ionic

Multiple Choice

Is Cu₂O a covalent or ionic bond.

• covalent

• ionic

Check and correct your paper.

Multiple Choice

Atoms gain, lose, or share electrons to have a full valence shell, and

• become unstable

• become chemically stable

• become radioactive

Multiple Select

Select the reactants in the following equation:

__Fe +__O₂ → __Fe₂O₃ 

• Fe

• O₂

• Fe₂O₃ 

Multiple Select

Select the products in the following equation:

__NaN₃ → __Na + __N₂ 

• NaN3

• Na

• N₂ 

Multiple Select

Select the reactants in the following equation:

__NaBr + __PbI₂ → __NaI + __PbBr₂ 

• NaBr

• PbI₂

• NaI

• PbBr₂ 

Check and correct your paper.

Check and correct your paper.

Check and correct your paper.