Question

why cadmium salts are white​

Answer 1

Explanation: First of all you must know that when an electron rises from its shell and returns back, it creates a photon

photon is a particle that emits light, this lights wavelength depend in the length of rise

so cadmium gives a specfic length which gives a photon which emits white light

Answer 2

Transition element exhibit colour to d-d transition. d-d transition will be possible only when d- subshell is not fully filled. ... thus there will be not d-d transition take place, so Cd2+ is white.

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