Alkali metals and their salts impart cha...

Alkali metals and their salts impart characteristic colours to an oxidizing flame. Explain the reason.

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The alkali metals and their salt impart characteristic colour to an oxidising flame. This is because the heat from the flame excits the outermost orbital electron come back to the ground state, they emit the absorbed energy in the form of light in visible region.
Lithium - Crimson red
Sodium - Yellow
Potassium - Lilac or pale violet
Rubidium - Red violet
Caesium - Blue violet.

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Knowledge Check

The metal which imparts Brick red colour to flame is

A

`Be`

B

`Mg`

C

`Ca`

D

`Ba`

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VGS PUBLICATION-BRILLIANT-THE s-BLOCK ELEMENTS -Short Answer Questions (4 Marks)

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