Earthguide Online Classroom

Reading the Periodic Table of the Elements

Diagram Source: Memorie Yasuda

Questions for thought

  1. If one atom of carbon weighs ~12 u, and it contains 6 protons that each weigh about 1 u,how many neutrons does an unbound atom of 12C contain?
  2. How many atoms of 12C make up 12.011 g of carbon-12?
  3. How many atoms of 12C make up 12.011 g of carbon-12?

Related resources

Related topics

  1. Avogadro's number
  2. Mole

Earth science topics where the periodic table is referenced

  1. Salinity and dissolved ions in seawater
  2. Minerals
  3. Composition of objects and matter in space
  4. Photosynthesis and nutrients
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