Integer (Z)= ...-3,-2,-1,0,1,2 3,4... A.If you add two integers you will get ineger Like 4 + 5 = 9 Integer+integer=integer So , you can say integers are closed under addition....
"Equivalent weight is that part of a chemical species which combines or replaces 1.008 gram of Hydrogen atom, 8 gram of Oxygen atom or 35.5 gram of Chlorine atom in a chemical reaction." The mathematical...