Chemical formulaA chemical formula is any of several kinds of notation for expressing the composition and structure of a chemical compound. Chemical formulas use element symbols for the atoms of each chemical element in a compound. There are several conventional types of chemical formula that present different levels of detail.
EquationIn mathematics, an equation is a mathematical formula that expresses the equality of two expressions, by connecting them with the equals sign=. The word equation and its cognates in other languages may have subtly different meanings; for example, in French an équation is defined as containing one or more variables while an égalité does not require variables, but in English, any well-formed formula consisting of two expressions related with an equals sign is an equation.
Expression (mathematics)In mathematics, an expression is an arrangement of symbols following the context-dependent, syntactic conventions of mathematical notation. Symbols can denote numbers, variables, operations, and functions. Other symbols include punctuation marks and brackets, used for grouping where there is not a well-defined order of operations.MoleculeA molecule is a group of two or more atoms that are held together by attractive forces known as chemical bonds; depending on context, the term may or may not include ions that satisfy this criterion. In quantum physics, organic chemistry, and biochemistry, the distinction from ions is dropped and molecule is often used when referring to polyatomic ions.
MathematicsMathematics is a field of knowledge concerned with abstract concepts such as numbers, geometric shapes, sets, functions, and probabilities. It uses logical reasoning and proof to study and establish their properties, often expressed as theorems, formulas, and equations. Mathematics is used to model and solve problems in science, engineering, technology, economics, and everyday life.
Inequality (mathematics)In mathematics, an inequality is a relation which makes a non-equal comparison between two numbers or other mathematical expressions. It is used most often to compare two numbers on the number line by their size. The main types of inequality are less than and greater than (denoted by < and >, respectively the less-than and greater-than signs).
TerminologyTerminology is a group of specialized words and respective meanings in a particular field, and also the study of such terms and their use; the latter meaning is also known as terminology science. A term is a word, compound word, or expression that in specific contexts is given specific meanings—these may deviate from the meanings the same words have in other contexts and in everyday language.
Commensurability (philosophy of science)Commensurability is a concept in the philosophy of science whereby scientific theories are said to be "commensurable" if scientists can discuss the theories using a shared nomenclature that allows direct comparison of them to determine which one is more valid or useful.
English pluralsHow English plurals are formed; typically -(e)s Part of a series onEnglish grammar Morphology Plurals Prefixes in English Suffixes frequentative Word types Acronyms Adjectives Adverbs flat Articles Coordinators Compounds Demonstratives Determiners list Expletives Intensifier Interjections Interrogatives Nouns Portmanteaus Possessives Prepositions list Pronouns case person Subordinators Verbs Verbs Auxiliary verbs Mood conditional imperative subjunctive Aspect continuous habitual perfect -ed -ing -ion -ive -ly Irregular verbs Modal verbs Passive voice Phrasal verbs Verb usage Transitivity Syntax Agreement Clauses in English Conditional sentences Copula Do-support Inversion Periphrasis Zero-marking Orthography Abbreviations Capitalization Comma Hyphen Variance African-American Vernacular English AmE and BrE grammatical differences Double negatives Grammar disputes Thou vte English plurals include the plural forms of English nouns and English determiners.
ScienceSystematic endeavour to gain knowledgeScience is a systematic discipline that builds and organises knowledge in the form of testable explanations about nature and society. It is driven by the scientific method: an empirical cycle that typically involves making observations, producing hypotheses, testing them with evidence, and drawing conclusions.Latin influence in EnglishAlthough English is classified as a Germanic language, it has been strongly influenced by Latin—primarily in its lexicon. Even though the grammar and core vocabulary of English are inherited from Proto-Germanic, a great deal of English vocabulary comes from Romance and Latinate sources.
Contemporary LatinContemporary Latin is the form of the Literary Latin used since the end of the 19th century. Various kinds of contemporary Latin can be distinguished, including the use of Neo-Latin words in taxonomy and in science generally, and the fuller ecclesiastical use in the Catholic Church – but Living, or Spoken, Latin (Latin used as a language in its own right as a full-fledged means of expression) is the primary subject of this article.*As an Amazon Associate I earn from qualifying purchases.