Elements, Compounds, and Mixtures

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. It can be an element or a compound.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each retains its own properties. Mixtures can be homogeneous or heterogeneous.

Front

Define 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 pure substance formed when two or more different elements chemically bond together in fixed proportions.

Front

What distinguishes a mixture from a compound?

Back

In a mixture, the components retain their individual properties and can be separated physically, while in a compound, the elements lose their individual properties and cannot be separated by physical means.

Front

What is a homogeneous mixture?

Back

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

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture where the components are not uniformly distributed, and different parts can be seen, such as a salad.

Front

Can elements be broken down into simpler substances?

Back

No, elements cannot be broken down into simpler substances by chemical means.

Front

What is a diatomic element?

Back

A diatomic element is a molecule composed of two atoms of the same element, such as O2 (oxygen) or N2 (nitrogen).

Front

What is a monatomic element?

Back

A monatomic element consists of single atoms that are not bonded to each other, such as noble gases like helium (He) or neon (Ne).