... 1.00 86 amu. Curiously, though, the mass of an alpha particle, which consists of two protons and two neutrons, is not 2( 1.0073) + 2( 1.00 86) = 4.0318 amu, as one might expect, but rather 4.0 015 ... tunnel will see that the entire train is in the tunnel at one time?(A) 1 .25 c(B) 0.8c(C) 0 .64 c(D) 0.6c(E) 0.36c 2. .A photon has J of energy. Planck’s constant, h, is J · s. The frequency ... carbon- 12 atom. That means that 1 amu = kg. We can express the mass of the elementary particles either in kilograms or atomic mass units:Particle Mass (kg) Mass (amu)Proton 1.0073Neutron 1.00 86 ElectronAs...