Question

characteristic colours imparted by 2A elements​

Answer 1

The characteristic colours imparted by II A elements are discussed below -

• The II A group contains the elements like Beryllium, Magnesium, Calcium, Strontium and Barium.
• The characteristic colour imparted by II A elements is green.
• Beryllium and Magnesium impart no colour to the flame due it requires very high excitation energy, because electrons are very closely bonded.
• In a flame test, when Calcium is heated it imparts a brick red colour.
• Strontium imparts crimson red colour, and Barium imparts an apple green colour in a flame test.
• Each metal has a characteristic flame emission spectrum.