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Acids and bases 1

The importance and properties of the bases (alkalis)

The bases (alkalis) The bases are the substances that dissociate in the water producing the negative hydroxide ions (OH–), Examples of some bases such as sodium hydroxide (the caustic soda) NaOH, calcium hydroxide (lime...

The transfer of the heat energy . 6

The importance of the heat (thermal energy)

The heat The heat is a form of energy that transfers from the higher temperature object to the lower temperature object, and is transferred through the conduction, the convection and the radiation.

Acids 0

The types and properties of the acids

Types of the compounds There are a countless number of existing compounds, they can be classified according to their properties only into the acids, the bases (alkalis), the oxides and the salts.

Mass vs weight 0

What are the factors affecting the weight?

The weight The reason of object’s falling downward the Earth is a type of force called the weight (the gravitational force), and you can feel this force when you carry an object or try...