Subatomic Particles and Atomic Structure Explained

The video tutorial explores the structure of atoms, focusing on subatomic particles: protons, neutrons, and electrons. It explains their charges, locations, and relative masses. Protons and neutrons reside in the nucleus, contributing to atomic mass, while electrons orbit the nucleus with negligible mass. The atomic number equals the number of protons, determining the element's identity. The video also covers how atomic mass is calculated and provides examples for practice.

What is the smallest unit of matter?

• Proton

• Electron

• Atom

• Molecule

Which subatomic particle is positively charged?

• Electron

• Photon

• Neutron

• Proton

Where are electrons located in an atom?

• Inside the nucleus

• Outside the nucleus

• In the proton cloud

• In the neutron cloud

What happens to an element if the number of protons changes?

• It remains the same

• It becomes an ion

• It becomes a different element

• It becomes a different isotope

What is the atomic number of carbon?

• 12

• 8

• 6

• 14

In a neutral atom, how do the numbers of protons and electrons compare?

• They are equal

• Protons are more

• Electrons are more

• It varies

Why do electrons not contribute significantly to the atomic mass?

• They are too few

• They are too light

• They have no charge

• They are outside the nucleus

What is the approximate atomic mass of carbon in AMU?

• 12 AMU

• 18 AMU

• 24 AMU

• 6 AMU

Which particles contribute to the atomic mass of an atom?

• Only protons

• Electrons and protons

• Only neutrons

• Protons and neutrons

If an atom has 6 protons and 6 neutrons, what is its atomic mass?

• 24 AMU

• 12 AMU

• 18 AMU

• 6 AMU