Atomic Number, Mass Number and Isotopes

No prep complete lesson to teach students how the number of protons, neutrons and electrons in an atom are calculated along with what isotopes are and how the relative atomic mass of isotopes is determined.

Includes interactive PPT with 5 page worksheet teaching students atomic number, mass number, isotopes and relative atomic mass along with self assessment and extension exercises

Learning Objectives
• Be able to define (a) atomic number, (b) mass number, © isotope and (d) relative atomic mass (Ar)
• Be able to calculate the number of protons, neutrons and electrons using an element’s atomic number and mass number
• Be able to work out which isotope is most abundant when given the mass numbers and Ar

Please see the preview for all materials of this fully editable resource

You may be interested in my other resources on the atom and bonding
History of the Atom, Atomic Structure and Electron Arrangement

Covalent bonding complete lesson
Ionic Bonding complete lesson

Prior knowledge needed
Atomic number and a basic understanding of the periodic table

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About this resource


Created: Jun 14, 2018

Updated: Jan 1, 2019


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