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Chlorophyll is the substance that gives plants their green colour.
paper
Chlorophyll
Iodine
Electrons don't have colour
The colour of a flame is not based on how many electrons and protons there are, however it is to do with electrons. When the electrons furthest from the nucleus of the atom are excited (in this case by the heat of the flame) they gain energy and "jump" up "energy levels". The electrons don't like this extra energy so in order to lose it, they emit a photon at a particular wavelength, which we perceive as colour.
yellow
Chlorophyll.
Dip an indicator into the substance and compare the colour to the chart.
The monitor colour has changed to pink due to inner loose soldering in case of a very old monitor. It can be fix by solderig the inner parts
White as pure, dry substance