Basic Chemistry Quiz

What is an atom?

• A type of ion

• A group of molecules

• The smallest unit of an element

• The smallest unit of a compound

Which of the following particles is NOT found in an atom?

• Photon

• Neutron

• Proton

• Electron

What is a molecule?

• A single atom

• A type of element

• A group of atoms bonded together

• An ion with a charge

What type of molecule consists of only one atom?

• Ionic molecule

• Monoatomic molecule

• Polyatomic molecule

• Diatomic molecule

What is an ion?

• A neutral atom

• An atom with a charge

• A type of molecule

• A compound of two elements

What does a chemical formula represent?

• The physical state of a substance

• The color of a substance

• The ratio of atoms in a compound

• The temperature of a reaction

Which of the following is a molecular formula for water?

• HO

• H2O2

• H2O

• O2H

What is the main characteristic of ionic compounds?

• They are always gases

• They have a balanced charge of ions

• They do not conduct electricity

• They consist of only nonmetals

Who developed the periodic table?

• John Dalton

• Dmitri Mendeleev

• Albert Einstein

• Marie Curie

What is the most abundant element in living cells?

• Nitrogen

• Hydrogen

• Carbon

• Oxygen