百度试题 结果1 题目What is the atomic number of an element?ps:Please answered in English 相关知识点: 试题来源: 解析 最佳答案译文,什么是元素的原子序数?It is the number of an element in thePeriodic table of the elements.反馈 收藏
Elements are the substances that make up all matter in the universe. Each element has a unique atomic number, which represents the number of protons inside the nucleus of one atom of that element. Protons are the positively charged particles inside an atom....
The chemical element with atomic number 20 is calcium. What is the abbreviation for calcium? A. Ca B. Cy C. Cg D. Ch 相关知识点: 试题来源: 解析 A。钙元素的英文是 calcium,其缩写形式是 Ca。选项 B“Cy”不是钙元素的缩写;选项 C“Cg”一般不是任何化学元素的缩写;选项 D“Ch”一般不是...
What element has the atomic number 28? What element has an atomic number of 10? What element has atomic number 4? What element has an atomic number of 16? What element is atomic number 54? What element has an atomic number of 80?
What happens inside the nucleus that causes the emission of beta particle ? View Solution The element with atomic number 84 and mass number 218 change to other element with atomic number 84 and mass number 214. The number ofαandβ-particles emitted are respectively: ...
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...
What element has a small atomic radius? Which subatomic particles contribute to an atom?s mass number but not its atomic number? What is the symbol for an atom containing 20 protons and 22 neutrons? The atoms contain 8 protons and 10 neutrons. Express your answer as an isotope. ...
The chemical element with atomic number 15 is phosphorus. What is the abbreviation for phosphorus? A. P B. Ph C. Po D. Py 相关知识点: 试题来源: 解析 A。磷元素的英文是 phosphorus,其缩写形式是 P。选项 B“Ph”一般不是磷元素的缩写;选项 C“Po”是钋元素的缩写;选项 D“Py”不是磷元素...
What is the atomic number of an element that has 43 protons and 50 neutrons? a. 43 b. 50 c. 86 d. 93 e. 100 What is the atomic number of an element with 9 protons and 10 electrons? What is the atomic number of an element with 8 protons, 9 neutrons, and 8 electrons? a. 9...
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