Multiple choice

Which of the following salts, on heating, emitts blue-green luminescence?

  1. Praseodymium(III) chloride

  2. Radium chloride

  3. Radon difluoride

  4. Rhodium(III) chloride
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Radium chloride is a white solid with a blue-green luminescence, especially when heated. It is less soluble in water than other alkaline earth metal chlorides. It is still used in the initial stages of the separation of radium from barium during the extraction of radium from pitchblende.

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