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doit_the_clown doit_the_clown
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7 years ago
In the periodic table of elements, elements that have similar chemical properties

(a)   are in a single vertical column.
(b)   are in a single horizontal row.
(c)   occupy a small block of adjacent rows and columns.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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papachulopapachulo
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7 years ago
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