The element with atomic number 14 is? A. Silicon B. Phosphorus C. Sulfur D. Chlorine 相关知识点: 试题来源: 解析 A。解析:原子序数为 14 的元素是硅元素。磷元素原子序数为 15,硫元素原子序数为 16,氯元素原子序数为 17。所以答案是 A。
and used doped or in combination with other materials in glass, semiconducting devices, concrete, brick, refractories, pottery, and silicones. Atomic number 14; atomic weight 28.086; melting point 1,414°C; boiling point 3,265°C; specific gravity 2.33 (25°C); valence 2, 4. SeePeriodic Ta...
Silicon element. Symbol Si. Atomic number 14. Atomic mass 28.085. Green circle.,站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商业图片、艺术插画、矢量、视频、音乐素材、字体等,已先后为阿里巴巴、京东、亚马逊、小米、联想、奥美、盛世长城、百度
To find the atomic number of the element placed diagonally to Group 14, Period 4, we will follow these steps:Step 1: Identify the Element in Group 14, Period 4 - The elements in Group 14 (also known as Group IV) include Carbon
doi:10.1038/118084b0J. A. HARRISNatureBrauner, B (1926) The new element of atomic number 61: illinium. Nature 118: pp. 84-85Brauner B (1926) The new element of atomic number 61: illinium. Nature 118:84–85
What element has a mass number of 14?Mass Number:A mass number is the total of all the protons and neutrons in the nucleus of a particular atom. Each of these subatomic particles contributes a single unit to the total mass of the atom. Mass numbers differ from the atomic mass on the ...
Which element has the atomic number 6?a) Heliumb)Carbonc) Oxygend) Hydrogen 相关知识点: 试题来源: 解析 b) Carbon 1. **确定原子序数定义**:原子序数对应元素原子核中的质子数。 2. **逐一分析选项**: - **a) 氦 (Helium)**:原子序数为2,由2个质子构成。 - **b) 碳 (Carbon)**:...
an element is a substance , all of ___ atoms have the same atomic number为什么选whose ? 请高手讲讲..相关知识点: 试题来源: 解析 首先句子后面是作定语的,由主句可以知道,修饰的是主语element.因为atoms是原子的意思,对于元素来说,逻辑关系自然是“元素里的原子”,所以element和atoms具有从属关系,用whose...
Classify the elements having atomic numbers(9,12,16,34,53,56)into three separate pairs on the basis of similar chemical properties. View Solution In the periodic table, the element with atomic number 12 will be placed in the group View Solution ...
What is the abbreviation for sodium? A. Sa B. Sn C. So D. Na 相关知识点: 试题来源: 解析 D。钠元素的英文是 sodium,其缩写形式是 Na。选项 A“Sa”不是钠元素的正确缩写;选项 B“Sn”是锡元素的缩写;选项 C“So”不是钠元素的缩写。反馈 收藏 ...