The atomic number of calculated as number of protons + number of neutrons. The number of protons are the same as atomic number. This implies that Nitrogen has seven protons. To get the the number of neutron we minus atomic mass from number of protons that is 14-7=7 neutrons
answered: Guest
2h2o2--> 2h2o + o2
this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.
add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.