Formula unit Formula unit A formula unit in chemistry is the empirical formula of any ionic or covalent network solid compound used as an independent entity for stoichiometric calculations. It is the lowest whole number ratio of ions represented in an ionic compound. Examples include ionic NaCl and KO and covalent networks such as SiO and C (as diamond or graphite). Ionic compounds do not exist as individual molecules; a formula unit thus indicates the lowest reduced ratio of ions in the compound. A "chemical formula" shows the kinds and numbers of atoms in the smallest representative unit of a substance. In
Compound modifier both (or all) of the words in a compound modifier are nouns, it is seen as not necessary to hyphenate them, as misunderstanding is unlikely. Japanese equivalents of adjectives can compound. This is quite common for "na"-adjectives, which function essentially as attributive noun phrases, while it is relatively uncommon for "i"-adjectives, and is much less common than Japanese compound verbs. Common examples include (noun + "i"-adjective) and ("i"-adjective stem + "i"-adjective). Compound modifier A compound modifier (also called a compound adjective, phrasal adjective, or adjectival phrase) is a compound of two or more attributive words: that is, two or more