2 ways which one carbon can differ from another
– The way the carbon are arranged in space. E.g. Diamond is tetrahedral whereas graphit has infinite array layer
– Carbon isotopes, they have the same number of protons but different number of protons.

3 ways which carbon atoms differ from uranium atoms
– Atomic number of carbon is 6 whereas for uranium is 92
-Atomic weight of carbon is 12 whereas for uranium is 238
– Carbon isotopes are mostly stable whereas uranium isotopes are usually radioactive.

– N-14 atomic weight is 14 whereas N-15 atomic weight is 15
– They are isotopes.
– N-15 has one more neutron than N-14

A) 94
B) 93 protons: Neptunium(Np)
94 protons: Plutonium ( Pu)
C) Rn: 86 protons

A) control rod assembly
B) cooling water out of the core
C) control rods
D) cooling water into the core
E) fuel rods