Just How Small is an Atom?

Which three particles are the main components of an atom?

• Protons, neutrons, and electrons

• Nucleus, protons, and electrons

• Nucleus, neutrons, and electrons

• Protons, neutrons, and nucleus

If the atoms in a grapefruit were expanded to the size of blueberries, how large would the grapefruit become?

• A house

• A football stadium

• The Earth

• A small marble

If an atom were scaled up to the size of a football stadium, what would mostly fill the space between the nucleus and the electrons?

• Other smaller particles

• Empty space

• Electromagnetic fields

• Protons and neutrons

To achieve the density of an atomic nucleus in a 1-foot box, approximately how many car nuclei would you need to collect?

• About 100 cars

• About 6.2 million cars

• About 6.2 billion cars

• About 2 cars