The uppercase in this font has as many real elements and atomic weights as possible. However, not all elements have a single letter (e.g. A). Those elements are make-believe w/ make-believe atomic weights. The lowercase is the same as the uppercase but without atomic weights. The rest of the elements are letter combinations that can made words in the English language (i.e. Ba but not elements like Hf). You will find them by using your system's character map.