a: chemical elements ~
b: nature's building blocks

What:

"The chemical elements are like nature's building blocks. The chemical elements are the building blocks of all substances."

Or maybe a Lego set with 118 different types of pieces.......


Useful?
Writer: David Sang, ‎Lawrie Ryan, ‎Jane Taylor
LCC:
Where:
Date: Dec 26 2015 7:41 PM


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