I am having trouble with the periodic table and we have been studying questions about elements, compounds and all the other stuff. What are some examples of pure compounds?

Expert Answers

An illustration of the letter 'A' in a speech bubbles

A element is a pure substance and is composed of identical atoms and cannot be further subdivided (into a different material). Compounds or pure compounds are made up of two or more elements in a fixed ratio. This ratio is the same throughout the compound. An example of a compound or a pure compound is water or H2O. It is made up of hydrogen and oxygen atoms, both of which are elements, in a fixed 2:1 ratio. That is, for each atom of oxygen, there are 2 atoms of hydrogen in water. This ratio stays fixed throughout the water and we can take a sample of water from anywhere and obtain the same ratio. Common salt or sodium chloride (NaCl) is another such example and has sodium and chlorine in 1:1 ratio. Some more examples of pure compounds include benzene (C6H6), carbon dioxide (CO2), methane (CH4), glucose (C6H12O6), etc.

Hope this helps. 

Approved by eNotes Editorial Team

We’ll help your grades soar

Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.

  • 30,000+ book summaries
  • 20% study tools discount
  • Ad-free content
  • PDF downloads
  • 300,000+ answers
  • 5-star customer support
Start your 48-Hour Free Trial