reaction mechanism — Introduction in chemical reactions (chemical reaction), the detailed processes by which chemical substances are transformed into other substances. The reactions themselves may involve the interactions of atoms (atom), molecules (molecule),… … Universalium
Verb argument — In linguistics, a verb argument is a phrase that appears in a syntactic relationship with the verb in a clause. In English, for example, the two most important arguments are the subject and the direct object.[1] Nearly all languages identify… … Wikipedia
Defining equation (physical chemistry) — For the detailed nature of defining equations see Physical quantity Main article: Physical chemistry In physical chemistry, there are numerous quantities associated with chemical compounds and reactions; notably in terms of amounts of substance,… … Wikipedia
Theta role — In Generative grammar, (in particular Government and binding theory and the Standard Theory of Transformational Grammar) a theta role or θ role is the formal device for representing syntactic argument structure (the number and type of noun… … Wikipedia
Enriched uranium — Proportions of uranium 238 (blue) and uranium 235 (red) found naturally versus enriched grades Enriched uranium is a kind of uranium in which the percent composition of uranium 235 has been increased through the process of isotope separation.… … Wikipedia
Structural formula — The structural formula of a chemical compound is a graphical representation of the molecular structure, showing how the atoms are arranged. The chemical bonding within the molecule is also shown, either explicitly or implicitly. There are several … Wikipedia
Marazion — For the Royal Navy warship, see HMS Marazion (1919). Coordinates: 50°07′31″N 5°28′33″W / 50.125278°N 5.475833°W / 50.125278; 5.475833 … Wikipedia
Classical Nahuatl grammar — The grammar of Classical Nahuatl is agglutinative, head marking, and makes extensive use of compounding, noun incorporation and derivation. That is, it can add many different prefixes and suffixes to a root until very long words are formed. Very… … Wikipedia
Dihydrogen cation — The hydrogen molecular ion, dihydrogen cation, or H2+, is the simplest molecular ion. It is composed of two positively charged protons and one negatively charged electron, and can be formed from ionization of a neutral hydrogen molecule. It is of … Wikipedia
resonance — /ˈrɛzənəns / (say rezuhnuhns) noun 1. the state or quality of being resonant. 2. the prolongation of sound by reflection; reverberation. 3. a similarity between two or more objects, ideas, words, etc. 4. the amplification of vocal tone by the… …