Physical Science Midterm Review 2023

Front

Which group of elements are NOT good conductors of electricity or heat?

Back

Non-Metals are not good conductors of electricity or heat.

Front

Nickel, oxygen, and potassium are classified as:

Back

Elements are pure substances that cannot be broken down into simpler substances.

Front

The element in the Lewis Dot Diagram pictured has how many valence electrons?

Back

The element has 8 valence electrons.

Front

What is the element symbol for Sodium?

Back

The element symbol for Sodium is Na.

Front

Which of these is NOT an example of a physical change?

Back

Burning is a chemical change, not a physical change.

Front

What is a conductor?

Back

A conductor is a material that allows the flow of electric current or heat.

Front

Define a compound.

Back

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

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture that consists of visibly different substances or phases.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.