Elements are arranged on the periodic table by _______. 

______ is the process by which molecules, ions, or colloidal particles in solution move from an area of greater concentration to an area of lesser concentration until uniform concentration is acheived. 

What are the three factors that affect chemical reactions?  1) catalyst 2) pressure 3) molecular weight 4) concentration 

Which of the following forms positive ions?

Zn(OH)2 is an example of a(n) _______. 

The two possible valences of the element Iron are

A planetary electron is also known as a valence electron. 

In which of the following bonds are electrons shared?

Name the compound N2O4. 

Bronze is an example of a(n) ________.