Struggling with your prescribed literature?
Our Literature Study Guides provide insights and analysis of themes and characters and includes guidelines for writing your exam.
a reaction that takes place automatically by itself, without requiring extra stimulation.
bonds that form between the hydrogen atom of one molecule and an oxygen, nitrogen or fluorine...
forms between two atoms if the two atoms share six electrons.
(also called allotropism) the property of some chemical elements to exist in two or more...