Atoms, Elements & Compounds

Front

What is a compound?

Back

A substance in which the atoms of two or more elements are combined together.

Front

TRUE OR FALSE: There are millions of elements.

Back

False.

Front

What does this picture represent? (element, compound, mixture)

Back

Element.

Front

How many elements are on the periodic table?

Back

116.

Front

What is carbon dioxide formed from?

Back

Two oxygen atoms chemically combined with a carbon atom.

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded.

Front

What is the periodic table?

Back

A tabular arrangement of all known elements organized by their atomic number.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.