Mr. Trible's science lecture covers atomic structure, focusing on protons, neutrons, and electrons. The atom is mostly empty space, with a dense nucleus containing protons and neutrons, while electrons orbit in the electron cloud. Protons define an element's identity, and valence electrons influence chemical properties. The lecture introduces energy levels within the electron cloud, explaining how electrons fill these levels. The concept of valence electrons is introduced, setting the stage for further exploration in the next class.

What are the three main components of an atom?

• Electrons, Neutrons, and Quarks

• Protons, Electrons, and Photons

• Protons, Neutrons, and Photons

• Protons, Neutrons, and Electrons

What analogy is used to describe the emptiness of an atom?

• A baseball field

• A swimming pool

• A football stadium

• A basketball court

Where are protons and neutrons located in an atom?

• In the outer shell

• In the electron cloud

• In the nucleus

• In the energy levels

What is the charge of a neutron?

• Variable

• Positive

• Negative

• Neutral

How much does a proton weigh in atomic mass units (AMU)?

• 0.54 AMU

• 1 AMU

• 2 AMU

• 0.1 AMU

What is the charge of an electron?

• Positive

• Negative

• Variable

• Neutral

How many electrons can the first energy level hold?

• 2 electrons

• 4 electrons

• 8 electrons

• 6 electrons

How many electrons can the second energy level hold?

• 6 electrons

• 8 electrons

• 2 electrons

• 4 electrons

What happens when an energy level is filled and a new electron is added?

• It stays in the same energy level

• It moves to the nucleus

• It jumps to the next energy level

• It gets ejected from the atom

What are valence electrons?

• Electrons in the nucleus

• Electrons in an incomplete energy level

• Electrons in a full energy level

• Electrons in the innermost energy level