There are many more examples. Note that measuring each of these properties will not alter the basic nature of the substance. Examples of chemical properties are: heat of combustion, reactivity with water, PH, and electromotive force.
Mathematical fonts. In mathematical mode you can change the typefaces of the fonts when needed. For instance, it's customary to represent real numbers with a blackboard bold font, or topological spaces with calligraphic font. This article shows several fonts in math mode.
Circle Monograms Font Family by Harold's Fonts. About: The set of 4 Circle Monograms fonts let you create custom 2- and 3-letter monograms, against a black or white background, with a choice of decorative frames. Tags: Dingbat, Font, Monograms.