A. the number of protons an element has B. the number of neutrons an element has C. the number of electron shells an element has D. the number of E. lectrons an element has 相关知识点: 试题来源: 解析 C。解析:The periods represent the number of electron shells an element has.反馈...
The elements in the periodic table are arranged in order of___. A. atomic number B. mass number C. atomic weight D. electron configuration 相关知识点: 试题来源: 解析 A。元素周期表中的元素是按照原子序数排列的。选项 B 质量数、选项 C 原子量和选项 D 电子构型都不是元素周期表排列的主要依据...
01. THE ELEMENTS AND THE PERIODIC TABLEThe number of protons in the nucleus of an atom is referred to as the atomic number, or proton number, Z. The number of electrons in an electrically neutral atom is also equal to the atomic number, Z. The total mass of an atom is determined ...
On the Web: Illinois State Water Survey - Prairie Research Institute - Nitrogen from the Atmosphere (PDF)(Dec. 06, 2024) See all related content nitrogen (N), nonmetallic element of Group 15 [Va] of theperiodic table. It is a colourless, odourless, tastelessgasthat is the most plentiful...
题目The periodic table is arranged in order of increasing ___. A. atomic number B. atomic weight C. density D. melting point 相关知识点: 试题来源: 解析 B。原因:文中提到“Mendeleev arranged the elements in order of increasing atomic weight.”。 反馈 收藏 ...
A7 (a) Refer to the Periodic Table provided and complete the table below.number of nucleon ion / atom number protons neutrons electrons Mg24121212Na2311121002168810427 b The symbol of the unknown atom is oY(i) Draw the full electronic structure of atom Y.(Use cross 'x' to represent an ...
The structure of the periodic table appeared to limit the number of possible elements. 子句类型: 简单句 连接词: 3. 句子成分 简单句 The structure of the periodic table [主语] appeared [系动词] to limit the number of possible elements. [表语] 4. 句子翻译 简单句 The structure of ...
argonon,inert gas,noble gas- any of the chemically inert gaseous elements of the helium group in the periodic table Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc. Want to thank TFD for its existence?Tell a friend about us, add a link to...
Paragraph4: The structure of the periodic table appeared to limit the number of possible elements. It was therefore quite surprising when John William Strut, Lord Rayleigh, discovered a gaseous element in 1894 that did not fit into the previous classification scheme. A century earlier, Henry Caven...
is the element that isatomic number2 on the periodic table. Each helium atom has 2protonsin its atomic nucleus. The atomic weight of the element is 4.0026. Helium does not readily form compounds, so it is known in its pure form as a gas. Fast Facts: Atomic Number 2 Element Name: Heli...