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SODIUM

Sodium is a soft silvery reactive element belonging to the group I of the periodic table. It is characterised by

 
Atomic number 11
 
Relative atomic mass 22.9898
 
Relative density 0.97
 
Melting point 97.5OC
 
Boiling point 892OC

OCCURRENCE

Sodium basically occurs as NaCl in sea water, lakes and rocks. It also occurs as Chile saltpetre (NaNO2).

EXTRACTION
DOWN’S PROCESS
Sodium is mainly […]

PHOTOELECTRIC EFFECT
What is photoelectric effect?
Photoelectric effect is the liberalisation of electrons from a metal surface exposed to any sort of electromagnetic radiation. This effect is a quantum process. Here radiation is regarded as a stream of photons each having an energy hv where […]