Atomic Structure and Forces

The video tutorial delves into atomic structure, explaining that all matter is composed of atoms, which consist of a nucleus surrounded by electrons. The nucleus contains protons and neutrons, which have similar mass, while electrons have a much smaller mass. Protons and electrons have equal but opposite charges, and neutrons are neutral. The video highlights that atoms are mostly empty space, with electrons orbiting the nucleus at a great distance. The nuclear force, a strong electrostatic force, holds the nucleus together.

What are the basic building blocks of all matter?

• Molecules

• Compounds

• Atoms

• Cells

What particles make up the nucleus of an atom?

• Electrons and protons

• Protons and neutrons

• Neutrons and electrons

• Protons and electrons

How does the mass of an electron compare to that of a proton?

• Equal to a proton

• Twice as much as a proton

• 1,800 times larger than a proton

• 1,800 times smaller than a proton

What is the unit used to measure atomic mass?

• Atomic mass unit (AMU)

• Pound

• Gram

• Kilogram

What is the charge of a neutron?

• Positive

• Negative

• Neutral

• Variable

What is the charge of a proton?

• Positive

• Negative

• Neutral

• Variable

What is the charge of an electron?

• Positive

• Negative

• Neutral

• Variable

What force holds the nucleus together?

• Nuclear force

• Gravitational force

• Frictional force

• Magnetic force

How much of an atom is empty space?

• Mostly empty space

• Completely filled

• About half

• Almost none

If an atom were the size of a football field, what would be the size of its nucleus?

• A basketball

• A marble

• A tennis ball

• A golf ball