Special typefaces

Special typefaces help the reader quickly distinguish certain letters, words, or phrases from the rest of the text. 

This chapter presents a quick reference guide for the use of typefaces (roman, italic, and bold), Greek letters, superscripts and subscripts, and special symbols that are commonly used in chemistry. Appendix 13-1 presents the symbols for commonly used physical quantities. 

Typeface the term for a family of characters of a particular design, each of which is given a particular name. The most commonly used for normal text is Times Roman, as used here for the main text, but many others are widely available, particularly for the better quality printers. They fall into three broad groups serif fonts with curves and flourishes at the ends of the characters (e.g. Times Roman) sans serif fonts without such flourishes, providing a clean, modern appearance (e.g. Helvetica, also known as Swiss) and decorative fonts used for special purposes only, such as the production of newsletters and notices (e.g. 

Website addresses, or URLs, are shown in a special monofont typeface, like this. If you re reading this in an ebook, those links are clickable. 

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