Cube root(number of atoms in a 1m^3 cube of silicon(simplification)=number of atoms in a one atom line, assuming that the atoms were arranged in an cubic crystal(simplification). Mass-energy of those atoms, times two (for complete destruction) and then subtract for the particles that do not decay immediately (I had to look that up, I think I got about 5/6th remaining)
Cube root(number of atoms in a 1m^3 cube of silicon(simplification)=number of atoms in a one atom line, assuming that the atoms were arranged in an cubic crystal(simplification). Mass-energy of those atoms, times two (for complete destruction) and then subtract for the particles that do not decay immediately (I had to look that up, I think I got about 5/6th remaining)