Understanding Matter and Empty Space

What does Ernest Rutherford's nuclear theory suggest about the structure of an atom?

• Most of the atom's mass is in the electrons.

• The nucleus is larger than the rest of the atom.

• The atom is mostly empty space with a dense nucleus.

• Atoms are solid throughout.

Why is it surprising that matter is mostly empty space?

• Because objects can pass through each other.

• Because objects are weightless.

• Because objects appear solid and don't collapse.

• Because objects are transparent.

What percentage of an atom's mass is contained in the nucleus?

• 75%

• 50%

• 10%

• 99.9%

How does the analogy of a steel scaffolding help explain the structure of matter?

• It shows that atoms are flexible.

• It illustrates how atoms are locked in a structure, preventing collapse.

• It demonstrates that atoms are visible from a distance.

• It suggests that atoms are made of steel.

Why don't objects fall through each other if they are mostly empty space?

• Because they are held by magnetic forces.

• Because they are too light to move.

• Because atoms are locked into a solid structure.

• Because they are glued together.