Subatomic Particles and Their Properties

The video tutorial introduces the concept of atoms, the smallest unit of an element, using gold as an example. It explains the atomic mass unit (AMU) as a measurement for the mass of atoms and molecules. The video details the subatomic particles: protons with a positive charge, neutrons with no charge, and electrons with a negative charge. It describes the nucleus as the atom's center, containing protons and neutrons, and the electron cloud where electrons are found. The tutorial concludes with a review of key vocabulary and encourages understanding of atomic mass units for extra credit.

What is the smallest unit of an element?

• A cell

• A molecule

• An atom

• A compound

What does AMU stand for?

• Atom Measurement Unit

• Atomic Mass Unit

• Atomic Measurement Unit

• Atom Mass Utility

Which subatomic particle has a positive charge?

• Electron

• Photon

• Proton

• Neutron

What is the charge of a neutron?

• Positive

• Negative

• Neutral

• Variable

Where are protons and neutrons located in an atom?

• Valence shell

• Outer shell

• Nucleus

• Electron cloud

What is the approximate mass of a neutron in atomic mass units?

• 0.5 AMU

• 1 AMU

• 6 AMU

• 1.87 AMU

Which subatomic particle is found in the electron cloud?

• Neutron

• Photon

• Proton

• Electron

What is the charge of an electron?

• Neutral

• Negative

• Variable

• Positive

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

• Equal

• Much smaller

• Slightly larger

• Much larger

What is the primary function of the electron cloud?

• To hold protons

• To contain neutrons

• To house electrons

• To stabilize the nucleus