Atomic structure (negligible electron mass) | Starter Quiz | Oak National Academy

Which statement is true about elements?

• They are composed of multiple types of atoms.

• They can be broken down into simpler substances by chemical means.

• They are the simplest form of matter that can exist under normal conditions.

• They are all metals.

Answer explanation

Elements are made up of only one type of atom and cannot be broken down into a simpler substance by chemical means.

What determines the identity of an element?

• The number of molecules it has

• The type of atoms it is made up of

• Its physical state

• Its colour

Answer explanation

The identity of an element is determined by the type of atoms that make it up.

In a chemical reaction, atoms...

• change into different elements.

• are destroyed.

• are created.

• rearrange to form new substances.

Answer explanation

In a chemical reaction, atoms rearrange to form new substances.

An element is a substance made up of only one kind of ...

Answer explanation

An element is a substance made up of only one kind of atom.

John Dalton's theory proposed that ___ are indivisible.

Answer explanation

John Dalton's theory proposed that atoms are indivisible and indestructible.

The ___ is a list of all known elements, ordered based on their properties.

Answer explanation

The periodic table is a list of all known elements, ordered based on their properties.