Introduction to Mass Number, Atomic Number, and Isotopes

The video tutorial explains the structure of an atom, focusing on protons, neutrons, and electrons. It describes how the atomic number defines an element and introduces isotopes, which have the same number of protons but different numbers of neutrons. The concept of ions is also covered, explaining how atoms become charged through the loss or gain of electrons.

What are the three main particles contained within an atom?

How does the number of protons in an atom define the type of element?

What is the difference between mass number and atomic number?

Explain what isotopes are and provide an example.

What happens to an atom when it loses an electron?

Describe the process of ionization.

How do positive and negative ions differ in terms of protons and electrons?