Elements, Compounds, Mixtures

Front

What is the definition of an element?

Back

An element is a substance that is made up of only one type of atom.

Front

How is a compound different from a mixture?

Back

A compound is a substance formed when two or more elements are chemically bonded together, while a mixture is a combination of two or more substances that are not chemically bonded.

Front

What is an example of a mixture?

Back

Brass, which is made of zinc and copper, is an example of a mixture.

Front

What is the chemical formula for ammonia?

Back

NH₃

Front

What is the chemical formula for carbon dioxide?

Back

CO₂

Front

What is NaHCO₃ commonly known as?

Back

Sodium bicarbonate or baking soda, which is a compound.

Front

What are the three states of matter?

Back

Solid, liquid, and gas.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, such as saltwater.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture that does not have a uniform composition, such as a salad.

Front

What is the law of definite proportions?

Back

The law of definite proportions states that a chemical compound always contains its component elements in fixed ratio by mass.