A chemical formula is a concise list of the elements in a compound and the ratios of these elements. To better understand what a chemical formula means, we must consider how an ionic compound is constructed from its ions.
A fallacy is an incorrect argument in logic and rhetoric. It gives a result which is not valid or lacks soundness. Fallacies are either formal fallacies or informal fallacies.
For the formal concept in philosophy and logic, see formal fallacy. For other uses, see Fallacy (disambiguation). A fallacy is the use of invalid or otherwise faulty reasoning, or wrong moves in the construction of an argument. A fallacious argument may be deceptive by appearing to be better than it really is.