78.1. THE PERIODIC TABLE 元素周期表 (图片可点击放大) In this section, we will explore the periodic table, which organizes chemical elements and provides valuable information about their properties and relationships. Understanding the periodic...
主族(main group/group A)指周期表上从左往右数的第1～2,13～18竖列的元素(或s区+p区元素),一列为一族. 主族元素用罗马数字加大/小写的字母“A”来表示,例如新标准的第2族在主副族标准是“IIA族(group IIA) ”。 副族(group B)指周期表上从左往右数的3～12竖列元素(或f区+d区+ds区元素), 只...
5、The Periodic Table 元素周期表 The periodic table of the elements was developed well over 100years ago. At that time it was an empirically derived arrangement based on the physical properties of the known elements. The modern periodic...
A column of elements down the table is called a group. There are18 groups in the standard periodic table. Each group has a number: from 1 to18. Elements in a group have electrons arranged in similar ways, which givesthem similar chemical properties. For example, group 18 is known as the...
A knowledge of the periodic table is a vital part of GCSE Chemistry. In this quiz we look at the group 1 elements - the alkali metals. After many years of work by many different scientists, the periodic table was devised. The scientist given most credit was a Russian, Dimitri Mendeleev ...
The PeriodicTableElements is an elegant app that is interactive and fun. Easy to use, easy to understand, simple and effective. It shows the periodic table of e…
periodic table of elements 美 英 un.元素周期表;无素周期表 英汉 un. 1. 元素周期表 2. 无素周期表 例句
The definitive online periodic table reference site including technical data, and photographs and descriptions of thousands of samples of the chemical elements.
The PeriodicTableElements is an elegant app that is interactive and fun. Easy to use, easy to understand, simple and effective. It shows the periodic table of e…
化学元素周期表的英文全称 Periodic Table of the Elements 缩写 PTE 拉丁文 英文 1 H 氢 Hydrogenium Hydrogen 2 He 氦 Helium Helium 3 Li 锂 Lithum Lithum 4 Be 铍 Beryllium Beryllium 5 B 硼 Borium Boron 6 C 碳 Carbonium Carbon 7 N 氮 Nitrogenium Nitrogen 8 O 氧 Oxygenium Oxygen 9 F ...