Hey, this is my first week in Quantum class, going pretty well so far. My first questoin is: 1.) What is an eV a Unit of...give it in terms of MKS Well my answer is that it is a unit of energy, and for MKS... 1 Electron*Volt = Joules 1 electron has a charge of 1.602*10^-19 C 1 Volt = 1 J/C Therefore 1.602*10^-19*1 means that 1 eV = 1.602*10^-19 J Is this correct reasoning? My next Question Neutrons at room Temperature have a kinetic energy of around .02 eV. What is their wavelength? KE = 0.2 eV 0.2 eV = q*V p = h/lambda 1 eV = 1.609*10^-19 J h = 6.626*10^-34 J*s * 1 ev/(1.609*10^-19 J) Therefore I get Planck's constant in terms of eV h = 4.136*10^-15 eV*s But how do I use the 0.2 eV in terms of the p = h/lambda? Thanks for any assistance!