The portal has been deactivated. Please contact your portal admin.

Lesson: Atomic Numbers and Mass Numbers Chemistry • 7th Grade

In this lesson, we will learn how to define and calculate the atomic numbers and mass numbers of different atoms.

Lesson Plan

Lesson Presentation

Lesson Video

Video Thumbnail
13:33

Lesson Explainer

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.