A. the number of protons in an atom B. the number of neutrons in an atom C. the number of electrons in an atom D. the total number of particles in an atom 相关知识点: 试题来源: 解析 A。元素的原子序数告诉我们一个原子中的质子数。原子序数等于质子数,选项 B 中子数不能由原子序数确...
The atomic number for tellurium is 52. Tellurium is classified as a metalloid on the periodic table of elements. Elements in this group possess a...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough ...
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...
More commonly, the isotope symbol already tells you the atomic number. For example, if the symbol is written as146C, the number "6" is listed. The atomic number is the smaller of the two numbers in the symbol. It is typically located as a subscript to the left of the element symbol....
A. Atomic clocks measure the passing of time based on the number of vibrations that occur within an atom. B. An atom is the smallest unit of matter that makes up an element. C. They need atomic clocks to help ...
What is the atomic number?Atoms:Atoms are the basic unit of matter. Each atom has a dense nucleus composed of neutrons and protons. It also has a less dense outer electron cloud. Neutral atoms contain the same number of protons and electrons, which are positively and negatively charged, ...
A. The number of protons B. The number of neutrons C. The number of electrons D. The sum of protons and neutrons 相关知识点: 试题来源: 解析 A。原子序数由质子数决定。选项 A 正确,原子序数等于质子数。选项 B 中子数不能决定原子序数。选项 C 电子数在原子呈电中性时等于质子数,但不是决定原...
This book by Oscar Wilde tells the story of Dorian Gray, a very handsome young man who spends his life only concerned with his own pleasure, regardless of the suffering he brings to others. The story starts with young Dorian having his portrait painted. His friend Lord Wotton talks about be...
Quantum theory provides an extremely accurate description of fundamental processes in physics. It thus seems likely that the theory is applicable beyond the, mostly microscopic, domain in which it has been tested experimentally. Here, we propose a Gedank
百度试题 结果1 题目24. The atomic number of carbon is six. How many electrons (电子) does one atm of carbon have? A. Tv B. Four. C. Six. D. Twelve. 相关知识点: 试题来源: 解析 21∼27ADCBDD优质解答 反馈 收藏