State and explain the law of definite proportions.
Solution : Atom in a neutral state has equal number of protons and electrons. If it d oesn’t contains equal number of protons and neutrons, it becomes ion. If there are more number of p rotons then it is positively charged and is called ation. If there are more number of e lectrons, it becomes negatively charged and it is called as anion. Hence the following diagram represents an ion as it has 16 protons and 18 electrons which means it does not contain equal numbe r of proton nd electron. Complete chemical symbol including mass number, atomic number, and net charge (if any) 1) Atomic number = number of protons Hence, tomic number of the given ion is 1 6. 2) Mass number = number of proton + number of neutron = 16+16 = 32 H ence, mass number of given ion = 32 . 3) Net charge = -2 because the given ion contain 2 excess electrons. 4) Symbol : Let’s say ion is ‘S’, then ymbol is as follows :