Subatomic Particles and Atomic Structure

Miss J introduces subatomic particles: electrons, protons, and neutrons, explaining their roles in an atom. She describes the nucleus and the arrangement of these particles. Using a simulation, she demonstrates building a lithium atom by placing protons, electrons, and neutrons in their respective positions. She then constructs a carbon atom, explaining the use of atomic and mass numbers to determine the number of neutrons. The video concludes with a recap of the key concepts.

What are the three main subatomic particles that make up an atom?

• Electrons, protons, and neutrons

• Atoms, molecules, and ions

• Quarks, leptons, and bosons

• Nuclei, shells, and orbitals

Where is the nucleus located in an atom?

• At the center of the atom

• On the outer shell

• In the electron cloud

• Between the protons and neutrons

What charge do protons carry?

• Variable

• Neutral

• Negative

• Positive

How many protons does a lithium atom have?

• Four

• Three

• Six

• Five

In a neutral lithium atom, how many electrons are there?

• Six

• Four

• Three

• Five

How do you calculate the number of neutrons in an atom?

• Subtract the atomic number from the mass number

• Add the atomic number to the mass number

• Multiply the atomic number by the mass number

• Divide the mass number by the atomic number

What is the atomic number of carbon?

• Six

• Seven

• Eight

• Nine

How many neutrons are in a carbon atom with a mass number of 12?

• Six

• Seven

• Eight

• Nine

What is the charge of neutrons?

• Neutral

• Variable

• Positive

• Negative

What is the significance of the periodic table in relation to atoms?

• It shows the temperature of elements

• It categorizes elements by color

• It lists all known molecules

• It organizes elements based on atomic structure