1 mole of plutonium = 244 gm
3.6 kg of plutonium = 3.6 × 1000 = 3600 gm
Number of moles = 3600 ÷ 244 = 14.754 moles
One moles of plutonium contains protons = 
Total number of protons in 14.754 moles = 
Total number of protons in 14.754 moles = 
Total Positive charge = 
Total positive charge =
C
So i believe is exercise:)
The answer would be C since metals have electrons that help in heating up the metal
Light will travel more slowly in a material with a higher index of refraction