A) Platinum
B) Copper
C) Aluminium
D) Molybdenum
Correct Answer: D
Solution :
Molybdenum (Mo) having electronic configuration\[[Kr]\,\,4{{d}^{5}},\,\,5{{s}^{1}}\], due to the presence of one unpaired electron in the outermost shell, emits it readily even at low temperature.
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