Elements, Compounds and Mixtures

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 different elements chemically bond together in fixed proportions.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the components are evenly distributed and not easily distinguishable, such as saltwater.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the components are not evenly distributed and can be easily distinguished, such as a salad.

Front

What is the difference between an element and a compound?

Back

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

Front

Can elements exist in different states of matter?

Back

Yes, elements can exist in solid, liquid, or gas states depending on temperature and pressure.

Front

What is a molecule?

Back

A molecule is the smallest unit of a chemical compound that retains its chemical properties, formed by 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 solution?

Back

A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent), such as sugar in water.