Atomic Structure

What are atoms primarily composed of?

• Molecules

• Cells

• Protons, Electrons, and Neutrons

• Compounds

How many different kinds of atoms are currently known?

• 92

• 100

• 118

• 200

What is the smallest part of an element?

• A molecule

• A compound

• An atom

• A cell

What determines the identity of an element?

• The number of electrons

• The number of neutrons

• The number of protons

• The atomic mass

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What is the force that pulls negatively charged electrons towards positively charged protons in an atom?

• Magnetic force

• Gravitational force

• Strong nuclear force

• Electric force