General Knowledge



Symbol : Mg,
Atomic Number — 12,
Mass Number — 24

Physical and Chemical Properties :
The metal magnesium doesn’t exist in nature in free state, because it is highly reactive. This is a white and extremely glazed metal like silver. The metal magnesium is malleable and ductile; that’s why it can easily be transformed into a thin wire or ribbon.

» The boiling point and melting point of this metal is 650°C and 110°C.

Uses :
The metal magnesium is used in making flash light ribbon, in photography and in fire crackers, in the composition of alloys, etc.


Magnalium — Mg + A1 + Cu + Fe
Duralumin — A1 + Cu + Mg
Elektron — Mg + Zn + Cu

1. Magnesia (MgO):
The magnesia (MgO) is also called milk of magnesia, which is a white coloured powder. This is slightly soluble in water, il is fluorescent to the light and it is fused at a very high tempcialun' therefore, magnesia is used in layer lining of blast furnace.

2. Magnesium Sulphate (MgSO4) :
This compound naturally occurs in the form of epsomite in epsome, which are abundantly found in hot water spring. This is a colourless crystalline solid substance. This is frequently used in cotton industry, in the manufacturing of soap, paint, etc. This is also used as a catalyst with platinum in the manufacturing or production of sulphuric acid (H2SO4).

3. Magnesium Alva [Mg (OH)2.MgCO3.3H2O] :
This compound is used in removing the acidity from the human stomach and it is used as an antacid tablet.