COVALENT
species names. These species tell you exactly how many atoms are in the covalent compound. The prefixes are 1 = mono 2 = di 3 = tri 4 = tetra 5 = penta 6 = hexa 7 = hepta 8 = octa 9 = nona 10 = deca All you have to do is write the species in the compound together, and add a subscript based on the numbers above:
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11. Empirical Formula Worksheet II - chemunlimited.com
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Rules for naming compounds 2010 - Creighton University
mattson.creighton.eduThe main trick to writing formulas from the names is to recall what is the charge on the cation and on the anion. For example, if we were to name calcium nitrate, we would start with realizing that the ions involved are Ca2+ and NO3-, so the formula has to be Ca(NO3)2. Note that we do not indicate any charges on/on/around the formula.