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The duodecimal system, also known as base twelve or dozenal, is a positional numeral system using twelve as its base.In duodecimal, the number twelve is denoted "10", meaning 1 twelve and 0 units; in the decimal system, this number is instead written as "12" meaning 1 ten and 2 units, and the string "10" means ten.
A small gross [3] or a great hundred [4] refers to a group of 120 items (ten dozen, 10×12). The term can be abbreviated gr. or gro., and dates from the early 15th century. It derives from the Old French grosse douzaine, meaning "large dozen”. [5] The continued use of these terms in measurement and counting represents the duodecimal number ...
Theoretical chemistry requires quantities from core physics, such as time, volume, temperature, and pressure.But the highly quantitative nature of physical chemistry, in a more specialized way than core physics, uses molar amounts of substance rather than simply counting numbers; this leads to the specialized definitions in this article.
The term has also jokingly been described as "A dozen and the baker made one extra for himself." A lesser-used regionalism is the Texas dozen, which generally consists of 15. This is typically used only in Texas and surrounding areas for such goods as flowers or baked goods, although can be applied to anything that is counted, such as photographs.
This glossary of chemistry terms is a list of terms and definitions relevant to chemistry, including chemical laws, diagrams and formulae, laboratory tools, glassware, and equipment. Chemistry is a physical science concerned with the composition, structure, and properties of matter , as well as the changes it undergoes during chemical reactions ...
Duodecimal: 207 12: Hexadecimal: ... This page was last edited on 12 January 2025, ... additional terms may apply. By using this site, ...
Duodecimal system may refer to: duodecimal, a base-12 number system; Dewey Decimal Classification, ... additional terms may apply.
A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs.