How to remember valency ? I always forget it and thus a problem also occurs with the molecular formulae and the reactions
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Answer:
In chemistry, valence electrons are often the focus of study because they play a vital role in the bonding behavior of an atom. Dr. Nivaldo Tro defines valence electrons as those that exist in the outermost energy shell of an atom. Quickly identifying the number of valence electrons is important in mastering chemistry. According to the University of Colorado at Boulder, valences are used to determine an element's place in the standard periodic table of elements. Clackamas Community College points out that major elements commonly used in chemical reactions, such as carbon and oxygen, exhibit unique behaviors due to the number of valence electrons they possess. The easiest method of determining valences is to just look at the periodic table.
Explanation:
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