The video tutorial introduces the concept of atoms, describing them as the smallest unit of an element. It explains that atoms are composed of three subatomic particles: protons, neutrons, and electrons. Protons and neutrons reside in the nucleus, while electrons are found in energy levels or orbitals. The video details the properties of each particle, including their location, mass, and charge. Protons have a positive charge and a mass of 1 amu, neutrons are neutral with a similar mass, and electrons have a negative charge and negligible mass compared to protons and neutrons.

What is the smallest unit of an element?

• Atom

• Proton

• Molecule

• Electron

Which part of the atom contains protons and neutrons?

• Energy levels

• Orbitals

• Nucleus

• Shells

What is the charge of a proton?

• Neutral

• Negative

• No charge

• Positive

Where are protons located in an atom?

• In the orbitals

• In the nucleus

• In the energy levels

• In the shells

What is the approximate mass of a neutron compared to a proton?

• Half the mass

• Twice the mass

• Same mass

• One-tenth the mass

When was the neutron discovered?

• 1950s

• 1920s

• 1940s

• 1930s

What is the charge of a neutron?

• No charge

• Neutral

• Negative

• Positive

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

• Same mass

• Twice the mass

• One thousand eight hundred twentieth of the mass

• Half the mass

Where are electrons located in an atom?

• In the energy levels

• In the neutrons

• In the nucleus

• In the protons

What is the charge of an electron?

• No charge

• Negative

• Neutral

• Positive