Bellwork - Unit 2 Week 5 Thursday

Two liquids are mixed together, when they mix together the solution begins to heat up quickly.  What type of change would this indicate? 

• Chemical Change

• Physical Change

What are the 3 main classifications on the Periodic Table of Elements? 

• Metals, Nonmetals, Metalloids

• Metals, Nonmetals, groups

• Groups, Periods, Metalloids

A silver necklace has more mass then the silver bracelet, and the silver bracelet has more mass then the silver ring.  Which piece of jewelry is going to have the greatest density?

• None, they will all have the same density because they are made of the same substance.

• Silver ring

• Silver necklace

From the following answer choices, which one would best describe aluminum, a type of metal.

• Aluminum is malleable, it allows electricity to flow through, and it has a shiny luster.

• Aluminum is malleable, it will stop the flow of electricity, and it has a dull luster.

Of the following molecules below, which one would be considered an element and not a compound?

• Na₃

• H₂O

• NCl

• NaCl

Why would baking a cake be considered a chemical change?

• A new substance has been made.

• You can separate the ingredients back into separate substances.

• You have the same substance after the change as you did before the change.