Properties of Atoms and Molecules Review

What is the definition of an atom?

• A tiny particle that makes up matter

• A combination of elements

• A molecule with a positive charge

• A group of protons and neutrons

What is the atomic number of an element based on?

• The number of electrons

• The number of neutrons

• The number of protons

• The number of isotopes

What is the difference between a molecule and a compound?

• One is radioactive.

• Molecules are made of the same atoms, while compounds are made up of two or more different types of atoms.

• They are both made of only a single atom.

• One makes you up and the other makes the thing that make you up.

What is a compound?

• A compound is a substance that contains more than one type of atom.

• An atom with protons, neutrons, and electrons.

• A pure substance that contains only one type of atom.

• Part of an atom.

what is sodium chloride an example of?

• molecule

• compound

• element

• atom

How many atoms are present in one molecule of carbon dioxide (CO2)

• 1

• 2

• 3

• 4

An atom's mass number is located below the element's name on the periodic table and tells the number of electrons in the atom. 

• True

• False

Find Cobalt on the periodic table. What is the chemical symbol for Cobalt.

• C

• Cu

• Co

• cO

What is the chemical symbol for the element hydrogen

• H
• He
• h
• he

What is the chemical symbol for the element Silicon

• S
• Si
• si
• Sl