相关知识点: 试题来源: 解析 (a)lithium: 2.1sodium: 2.8.1potassium: 2.8.8.1They have the same number of valence electrons.All the elementshave one valence electron. 反馈 收藏
Remember an element's electron cloud will become more stable by filling, emptying, or half-filling the shell. However, figuring out how stable an element is and how it will react with other elements isn't as simple as just looking at the number of electrons in its outermost shell. The la...
The valence electrons an a certain element is defined as the number of the electrons present in the outermost shell of the element. It can be determined by using the electronic configuration of the elements. Answer and Explanation:1 We are told...
Just two strategies existed at the time to categorize these elements: separating them into metals and nonmetals or grouping them by an element's number of valence electrons (the electrons in the outermost shell). The first section of Mendeleev's book dealt with just eight of the known elements...
The outer electrons are called valence electrons. Because they have the same number of valence electrons, elements in a group share similar chemical properties. The Roman numerals listed above each group are the usual number of valence electrons. For example, a group VA element will have 5 ...
See how well you can identify the number of valence electrons in various elements by using this quiz and worksheet. These review materials are...
Across a period, each consecutive element has an additional proton in the nucleus and an additional electron to the valence shell. The vertical columns are groups. Elements in any one group (or column) have the same number of valence electrons (Figure 1); the alkali metals lithium and sodium...
Valence electrons are the electrons located in the highest energy level of an atom. Valence electrons are important because they are the electrons that participate in chemical bonds between atoms. Answer and Explanation: The correct answer is e. Cl. Valence electrons are the ...
Modern periodic table is based on atomic number of elements and elements of a group have same number of electrons in their valence shell. Was this answer helpful? 1Similar Questions Q1 The atoms of elements belonging to the same group of periodic table have the same : View So...
什么言您爱我。 [translate] aElectronegative. For an atom, having a tendency to accept valence electrons. Also, a term used to de-scribe nonmetallic elements 电阴性。 为原子,有倾向接受化学价电子。 并且,期限曾经描述非金属元素 [translate] ...