A (usually small) group of people who perform music together. Did you see the new jazz group? (astronomy) A small number (up to about fifty) of galaxies that are near each other. (chemistry) A column in the periodic table of chemical elements. (chemistry) A functional entity cons...
The group number is an identifier used to describe the column of the standard periodic table in which the element appears. Groups 1-2 termed s-block elements. Groups 1-2 (except hydrogen) and 13-18 are termed main group elements.
Summary Members of group 14 of the periodic table (14th vertical column) are summarised as carbon group consisting of carbon (C), silicon (Si), germanium (Ge), tin (Sn) and lead (Pb). Group 14 elements have four valence shell electrons and therefore tend to form covalent compounds. This...
column of elements in the periodic table of the chemical elements 相关学科: 学科讨论 暂无讨论内容,你可以发起讨论推荐文献 发布年度 会议/ 期刊 按被引用数 Climate change 2007 : the physical science basis : summary for policymakers, a report of Working Group I of the Intergovernmental Panel on ...
Which of the following is a characteristic of the modern periodic table? a. A group is a horizontal row on the periodic table. b. A period is a column on the periodic table. c. The elements in each group have similar chemical properties. d. The B groups c ...
In which period of the periodic table is this element located?The elements in a column of the periodic table are known as: a. metalloids b. a period c. noble gases d. a groupWhat is the name of the element found in...
In periodic table the horizontal rows are called periods and the vertical column are called group. There are seven periods and 18 groups present in the table and some of those groups are given special name as follows, Group-1→Alkali metalGroup-2→Alkaline ...
A column in the periodic table of the elements.属，族：元素周期表上的一栏 A stratigraphic unit, especially a unit consisting of two or more formations deposited during a single geologic era.地层学单位：地层学中的一个单位，尤指包括在同一地质时期沉积的两个或两个以上地层的单位 Mathemat...
释义 n.组，团体，集团; 群，批; （雕塑等的）群像; （英美的）空军大队 v.使成群，集合; 分类，归类 词态变化 复数: groups;第三人称单数: groups;过去式: grouped;过去分词: grouped;现在分词: grouping;实用场景例句 The colleges grouped together to offer a wider range of courses.这些...
10.(Chemistry)chemAlso called:radicaltwo or more atoms that are bound together in a molecule and behave as a single unit:a methyl group -CH3. Comparefree radical 11.(Chemistry) a vertical column of elements in the periodic table that all have similar electronic structures, properties, and val...