Relative Size of Atoms (1-5)

What is the primary reason atoms are considered mostly empty space?

• Because atoms are too small to see

• Because electrons are negatively charged

• Because the nucleus is positively charged

• Because the nucleus occupies less than 0.01 percent of the atom's total volume

In the simplified planetary model of an atom, how are electrons thought to behave?

• They orbit the nucleus like planets around the sun

• They form a solid shell around the nucleus

• They are evenly distributed throughout the atom

• They remain stationary

What is the mass percentage of the nucleus in an atom?

• Exactly 25%

• Less than 50%

• Exactly 50%

• Over 99%

If the nucleus of an atom was the size of a pea, how would the electron shell compare in a visual analogy?

• The size of a car

• The size of an entire stadium

• The size of a house

• The size of a basketball

Why do objects feel solid if they are mostly empty space?

• Because of the gravitational force between atoms

• Because atoms are tightly packed with no space in between

• Because of the strong nuclear force

• Because of the electromagnetic force repelling electron shells