The Water Course

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TWC Prologue

TWC 0.01 – How Does Water Hold Itself Together?

How Does Water Hold Itself Together?

The starring roles in water chemistry, apart from water molecules themselves, are played by the dissolved CO₂ from the atmosphere and the calcium and magnesium salts from the bedrock. To understand properly how these substances dissolve into your water — and how they sometimes undissolve — you need to understand how water molecules hold themselves together.

Sharing Electrons

An atom consists of a positively charged nucleus surrounded by negatively charged electrons. A key to the way an atom behaves in a chemical reaction is the number of electrons it has. The electrons in an atom are arranged in a series of ‘shells’ — energy levels that can contain a fixed number of electrons.