The atomic number of an element gives the proton and electron in the atom while the mass number gives the total number of protons and neutron
the combustion of fossil fuels and the smelting of sulphide ores and volcanic emissions.
Chemical reactions are known as electron transfer reaction.
An hour is 60 minutes. So you multiple the hot by 60. You get 180 minutes plus the 75 remaining minutes. The answer is 255
