Physical Science Final Review

Front

The smallest unit of an element that maintains the properties of that element is known as?

Back

an atom

Front

What is the balanced equation for the reaction of phosphorus and oxygen to form phosphorus trioxide?

Back

1 P₄ + 3 O₂ → 2 P₂O₃

Front

When dissolved in water, acids produce what?

Back

hydrogen ions

Front

What are the two types of waves?

Back

longitudinal and transverse

Front

A subatomic particle with a positive charge is called?

Back

a proton

Front

What is the definition of an element?

Back

A substance that cannot be broken down into simpler substances by chemical means.

Front

What is the definition of a compound?

Back

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

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the pH scale?

Back

A scale used to measure the acidity or basicity of a solution, ranging from 0 (acidic) to 14 (basic).