TEST 5 - The Physical World 1

The first historical attempt to classify matter into categories was made by ...

• the Jews.
• the Romans.
• the Greeks.
• Robert Boyle.

The study of materials by breaking them down into their component parts is called. . .

• analysis.
• decomposition.
• destruction.
• criticism.

The smallest particle that retains the properties of its element is called a(n) ..

• molecule.
• atom.
• ion.
• macromolecule.

A shorthand representation of an element's name is called its...

• formula.
• equation.
• symbol.
• atom.

An element that is a liquid at room temperature is

• mercury.
• oxygen.
• sodium.
• water.

Atoms of the same element chemically join to form a ..

• compound.
• mixture.
• molecule.
• colloid.

Atoms of different elements join chemically to form a ...

• diatomic molecule.
• pure element.
• mixture.
• compound.

How many hydrogen (H) atoms are in one molecule of acetic acid (HC₂H₃O₂)?

• 1
• 2
• 3
• 4

Both elements and compounds are classified as ...

• pure substances.
• mixtures.
• solutions.
• heterogeneous matter.

The smallest particle of a compound that retains the properties of its compound is called a(n)...

• atom.
• molecule.
• mixture.
• ion.