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.
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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...
How can you calculate the valency of each element?
The valency The valency is the number of electrons that an atom gains, loses or even shares during a chemical reaction, The valency is the number of electrons that an atom needs to gain or...
The properties and the measuring devices of the mass
The properties of the mass The mass is the amount of the matter in an object, the mass of any matter is a fixed value, It does not change by changing the state of...