Answers

2015-09-01T18:26:28+05:30
Because of the impurities due to which the breaking of that atom shell takes place and electrons jump from one shell to anotherĀ 
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2015-09-01T18:38:21+05:30
The flames inĀ a fire burn according to chemical principles , and sometimes the material burned is or has in it a substance that burns with a green flame.
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