Understanding Atoms and Molecules

What are atoms?

• The largest particles in the universe

• Tiny particles that make up everything

• Particles that can be broken down chemically

• Only found in living organisms

What are the three main parts of an atom?

• Nucleus, shells, and bonds

• Protons, neutrons, and electrons

• Elements, molecules, and compounds

• Mass, weight, and charge

What determines an element's atomic number?

• The number of electrons in its outer shell

• The total mass of its nucleus

• The number of protons in its nucleus

• The number of neutrons in its nucleus

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What is formed when different elements combine with each other?

• Isotopes

• Atomic mass

• Molecules

• Atomic weight