百度试题 结果1 题目6 An atom of element Q contains 19 electrons, 19 protons and 20 neutrons.What is Q? B A calcium B potassium C strontium D yttrium 相关知识点: 试题来源: 解析 B 反馈 收藏
Protons and Neutrons: What Are They?Jean Louis Van Belle
Elements in the same group have the same number of what? A. Protons B. Neutrons C. Electrons D. Valence E. lectrons 相关知识点: 试题来源: 解析 D。原因:“Elements in the same group have the same number of valence electrons.”。 反馈 收藏 ...
What element has 6 valence shell electrons and 16 protons? Write about the element in the periodic table with atomic number 60. What is the name and symbol of the element that has an atomic number of 11 and 12 neutrons? How many electrons does a neutral atom of this element have? What ...
What element has 53 protons and 74 neutrons? What is the atomic number of carbon-12? What is a fissile isotope? What element is formed by the alpha decay of Hg-202? What daughter nuclide forms when bismuth-210 undergoes alpha decay?
What is an atom that has more protons than electrons? Atoms: Atoms are the purest form of matter. They consist of protons, neutrons, and electrons. The periodic table lists all of the different types of atoms that are known to exist and are known as elements. ...
An atom containing 34 protons, 43 neutrons, and 34 electrons would have what symbol?选择语言:从 到 翻译结果1翻译结果2 翻译结果3翻译结果4翻译结果5 翻译结果1复制译文编辑译文朗读译文返回顶部 一个包含 34 质子、 中子 43 和 34 电子的原子会有什么符号? 翻译结果2复制译文编辑译文朗读译文返回顶部 ...
ICSEC - Grade 09 - CHEMISTRY - Atomic Structure And Chemical Bonding - Q23
of the mass of a single carbon-12 atom, at rest. The protons and neutrons of the nucleus account for nearly all of the total mass of atoms, with electrons and nuclear binding energy making minor contributions. Thus, the numeric value of the atomic mass w...
An atom is built with a combination of three distinct particles: electrons, protons, and neutrons. Each atom has a center nucleus, where the protons and neutrons are densely packed together. Surrounding the nucleus are a group of orbiting electrons. ...