Certain chemical characteristics are associated with various groups of atoms called functional groups. Particular groups of atoms occur in a large molecule, and the characteristic chemistry is anticipated, for example, CH3Cl. Here the functional group Cl atom is attached to carbon. Hydrogen is also ...
9、These atoms are grouped into molecules.这些原子集合成分子。10、A group of individuals can be called a population.个体的集合称为种群。11、Some groups are circulating petitions.一些团体在散发请愿书。12、He is one of the most effective writers of our group.他是我们组的笔杆子之一。...
The meaning of GROUP is two or more figures forming a complete unit in a composition. How to use group in a sentence.
a因为他锻炼我们的意志 Because he exercises our will [translate] aan atom or group of atoms that carries a positive or negative charge as a result of having lost or gain one or more electrons 运载一个正面或负电荷由于丢失的原子或小组原子或获取一个或更多电子 [translate] ...
A functional group is a chemically reactive atom or group of atoms that imparts characteristic properties to the family of organic compounds containing it. The site of reaction in an organic molecule is often a functional group, a multiple covalent bond, or a polar single bond. An electron-poo...
group of characters译成中文是：字符组。例句：The pattern matches any group of characters not containing a comma.此模式与任何不包含逗号的字符组匹配。关键词“character”详解 一、音标：英 [ˈkærəktə(r)] 美 [ˈkærəktər]二、释义：...
Group, in chemistry, a column in the periodic table of the chemical elements. In a group, the chemical elements have atoms with identical valence electron counts and identical valence vacancy counts. Groups are numbered from 1 to 18. Learn more about gro
Functional group, any of numerous combinations of atoms that form parts of chemical molecules, that undergo characteristic reactions themselves, and that in many cases influence the reactivity of the remainder of each molecule. In organic chemistry the c
1.any collection or assemblage of persons or things; cluster; aggregation. 2.a number of persons or things ranged or considered together as being related in some way. 3.Also calledradical.two or more atoms specifically arranged and usu. behaving as a single entity, as the hydroxyl group, –...
any collection or assemblage of persons or things; cluster; aggregation: a group of protesters; a remarkable group of paintings. a number of persons or things ranged or considered together as being related in some way. Also calledradical.Chemistry.two or more atoms specifically arranged, as the...