![]() ![]() The general rules which are used in this learning chemistry topic to find the oxidation number of the periodic table elements are given below, The formation of water (H 2O) and hydrochloric acid (HCl) molecules can not be explained from the classical definition but explained easily by oxidation number rules. ![]() For example, a water molecule is formed by bonding hydrogen with oxygen, and hydrochloric acid is formed by bonding hydrogen with chlorine. To determine or balancing common redox reactions, we used the oxidation number rule because some of the reactions can not be explained by electronic or classical concepts. ![]() How to find the oxidation number of elements? One of the most important properties that distinguish transition metals or d-block elements from non-transition elements is variable oxidation numbers or states. The s-block elements commonly show +1 and +2 oxidation numbers but p-block elements commonly show +3, +4, -3, -2 and -1 oxidation numbers. Some general rules are used for the calculation of the oxidation numbers of s, p, d, and f-block elements in the periodic table. Therefore, halogen atoms commonly show negative and alkali or alkaline metals commonly show positive oxidation state or number. For example, halogens like fluorine (F), chlorine (Cl), bromine (Br) are highly electronegative but alkali or alkaline metals like sodium (Na), aluminum (Al), potassium (K), calcium (Ca) have highly electropositive. The less or more electronegative partner of a binary compound arbitrarily assigned positive or negative oxidation numbers or states of the periodic table elements. ![]()
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