Chemistry Vocabulary Quiz

The smallest unit of matter that retains the properties of an element is (a)_____.

• Ion

• Compound

• Molecule

• Atom

Which term refers to a substance formed when two or more different elements chemically combine?

• Solution

• isotope

• Mixture

• Compound

A molecule is (a)_____.

• Two or more atoms chemically bonded together

• A type of ion

• A mixture of different substances

• A single atom

Which particle has a negative charge and orbits the nucleus of an atom?

• Proton

• Neutron

• Electron

• Nucleon

pH measures (a)_____of a solution.

• Temperature of a solution

• 
  Acidity or basicity of a solution

• Speed of a reaction

• Temperature of a solution

A catalyst in a chemical reaction is (a)____

• A substance that slows down reactions

• A type of acid

• A substance that speeds up reactions without being consumed

• A product of combustion

An atom that has gained or lost electrons is called an (a)_____.

• Ion

• Element

• Isotope

• Molecule

The process called when a substance loses electrons in a reaction is (a)_____.

• Neutralization

• Reduction

• Condensation

• Oxidation

(a)_____ is a pure substance made of only one type of atom.

• Compound

• Mixture

• Solution

• Element

Isotopes are (a)_____.

• Different forms of the same compound

• Atoms of the same element with different numbers of neutrons

• Molecules with opposite charges

• Types of chemical bonds