CHEM Sem 1 Final Exam Review

Front

What indicates a chemical change has taken place?

Back

Indicators of a chemical change include a change in color, the formation of a solid precipitate, and the production of a gas. The expansion of particles does NOT indicate a chemical change.

Front

What is an example of a mixture?

Back

Bronze pipe (Cu, Sn) is an example of a mixture, while iron filings (Fe), copper wire (Cu), and carbon dioxide (CO2) are not mixtures.

Front

Which element is a halogen?

Back

Bromine is a halogen. Other examples of halogens include chlorine and iodine.

Front

What is the mass number of an atom?

Back

The mass number is equal to the total number of protons and neutrons in an atom.

Front

What is matter?

Back

Anything that has mass and takes up space is called matter.

Front

What is a chemical change?

Back

A chemical change is a process where substances transform into different substances with different properties.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas.

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together.