Elements, Compounds, and Mixtures

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. For example, salt (NaCl) is a compound made of sodium and chlorine.

Front

What is an element?

Back

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

Front

What is a mixture?

Back

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

Front

How can mixtures be separated?

Back

Mixtures can be separated through physical changes, such as filtration, evaporation, or distillation.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O, which means it is made up of 2 hydrogen atoms and 1 oxygen atom.

Front

What is the difference between a compound and a mixture?

Back

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

Front

What is the chemical formula for table salt?

Back

The chemical formula for table salt is NaCl, which consists of sodium (Na) and chlorine (Cl) atoms.

Front

What cannot be broken down into other substances?

Back

An element cannot be broken down into other substances; it is the simplest form of matter.

Front

What are the components of sulfuric acid (H2SO4)?

Back

Sulfuric acid (H2SO4) is made up of 2 hydrogen atoms, 1 sulfur atom, and 4 oxygen atoms.

Front

What is an atom?

Back

An atom is the smallest unit of an element that retains the properties of that element. It consists of protons, neutrons, and electrons.