E,C, M

A pure substance that cannot be broken down chemically

A mixture of different substances

A compound made of two or more atoms

A substance found only in laboratories

Elements can be broken down chemically into simpler substances.

Each element is made up of its own type of atoms.

Elements are represented by three-letter symbols on the Periodic Table.

There are only 50 known elements.

Helium

Water

Salt Water

Glucose

Helium

Copper

Sulfur

Water

A substance that can be broken down chemically into simpler substances

A pure substance made up of only one type of atom

A mixture of two or more substances

A compound formed by combining different atoms

Compounds are pure substances.

Compounds can be separated by physical means.

Compounds are composed of two or more different elements chemically combined.

Compounds have the same properties as the elements that make them up.

A substance that can be broken down chemically into simpler substances.

A pure substance made up of only one type of atom.

A mixture of two or more substances.

A compound formed by combining two elements.

water

gold

salt

sugar

They are composed of two or more different elements chemically combined.

They can be separated by physical means.

They have the same properties as the elements that make them up.

They are always heterogeneous.

Carbon Dioxide

Copper

Water

Glucose

Oxygen

Water (H₂O)

Gold

Mixtures can be separated physically, compounds cannot

Mixtures are chemically bonded, compounds are not

Compounds can be separated by filtration, mixtures cannot

Compounds always contain water

Cement

Salt Water

Soil

Glucose

Homogeneous mixtures have a uniform composition, while heterogeneous mixtures do not.

Homogeneous mixtures contain substances in different states of matter, while heterogeneous mixtures do not.

Heterogeneous mixtures cannot be separated, while homogeneous mixtures can.

Heterogeneous mixtures are always solutions, while homogeneous mixtures are not.

element

compound

element

compound

element

compound

element

compound

element

compound

left

middle

right

all of them

Hetergeneous

homogenous

Homogeneous

Heterogeneous

An element

A molecule

A compound

A mixture of elements and compounds

Homogeneous

Heterogeneous

A compound

A mixture

An atom

An element

An element

A molecule

A compound

A mixture

When two or more substances are combined physically, but not chemically.

When two or more compounds are combined chemically, but not physically.

When two or more atoms are chemically combined, but not physically combined.

When two or more substances are neither physically nor chemically combined.

Homogeneous

Heterogeneous