Atomic Number, Mass Number and Isotopes

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.

Complete lesson with interactive PPT with 5 page worksheet teaching students atomic number, mass number, isotopes and relative atomic mass.

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

No prep resources included

  1. Student worksheet with tasks using literacy and numeracy skills and extension exercises
  2. Complete interactive PPT.

Please see the preview for all worksheets

All resources are fully editable

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About this resource


Created: Jun 14, 2018

Updated: Oct 23, 2018


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