Elements, Compounds and Mixtures.

Element

A pure substance made of one kind of atom.

An element cannot be separated into simpler substances by chemical or physical means.

Found on the Periodic Table.

Pure substance

A material in which all of the basic particles are identical. Only one type of element or compound is present.

Compound

A pure substance made of two or more elements that are chemically combined (or bonded).

Mixture

Two or more substances that are mixed but not chemically combined.

Atom

The basic unit of matter

Molecule

Two or more atoms covalently bonded together.

The smallest unit that keeps the same properties.

e.g. a water molecule H2O

mixture

Air is a/an

element

Krypton (Kr) is a/an

compound

Water (H₂O) is a/an

compound

Ammonia (NH₃) is a/an

mixture

wood is a/an

compound

dry ice (CO₂)

compound

glucose (C₆H₁₂O₆) is a/an

compound

sulfuric acid (H₂SO₄) is a/an

element

Bismuth (Bi) is a/an

compound

Alcohol (CH₃OH) is a/an

compound

Salt (NaCl) is a/an

mixture

It is also an example of an 'alloy', which is a mixture that includes at least 1 metal element.

Bronze consists of copper and tin.

Bronze is a/an

compound

Baking Soda (NaHCO₃) is a/an

mixture

Milk is a/an

mixture

Petrol (gasoline) is a/an

element

Uranium (U)

mixture

ink is a/an

element

Titanium (Ti) is a/an

element

Iron (Fe) is a/an₋

mixture

Popcorn is a/an

element

Gold (Au) is a/an

mixture

Pizza is a/an

mixture

Concrete is a/an

Compound

Each colored dot is a different element. Dots that are touching are chemically bonded. Does this represent an element, compound or mixture?

Mixture of one element and one compound

Each colored dot is a different element. Dots that are touching are chemically bonded.

Does this represent an element, compound or mixture?

Mixture of 2 different elements

Each colored dot is a different element. Dots that are touching are chemically bonded.

Does this represent an element, compound or mixture?