Elements, Mixtures, and Compounds

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together in a fixed ratio, resulting in a new substance with different properties.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. The individual components retain their own properties.

Front

What is the difference between an element and a compound?

Back

An element consists of only one type of atom, while a compound is made up of two or more different types of atoms chemically bonded together.

Front

Can a compound be separated into its components?

Back

No, a compound cannot be separated into its components by physical means; it requires a chemical reaction to break the bonds.

Front

What is a molecule?

Back

A molecule is the smallest unit of a chemical compound that retains its chemical properties, consisting of two or more atoms bonded together.

Front

What is the law of definite proportions?

Back

The law of definite proportions states that a chemical compound always contains the same proportion of elements by mass.

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 where the components are not uniformly distributed, such as a salad.

Front

What happens during a chemical reaction?

Back

During a chemical reaction, bonds between atoms are broken and new bonds are formed, resulting in the formation of new substances.