Chemistry·Matter · Isotopes · NSSCO 2.2
Isotopes & relative atomic mass
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Atoms of the same element can have different masses. Learn what isotopes are, why they behave the same chemically but differ physically, what radioactive isotopes are used for, and how to work out relative atomic mass as a weighted average.
What you'll learn in this lesson
By the end you should be able to (NSSCO Chemistry 2.2):
- Define an isotope as atoms of the same element with the same number of protons but different numbers of neutrons
- Give examples of isotopes (carbon, hydrogen, chlorine, uranium)
- Explain why isotopes have the same chemical properties but different physical properties
- Describe radioactive isotopes and some of their uses
- Calculate the relative atomic mass of an element from the abundances of its isotopes
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