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
An atom that has more protons than electrons is called a cation. Ions are charged atoms or combinations of atoms. When an atom loses one or more...Become a member and unlock all Study Answers Try it risk-free for 30 days Try it risk-free Ask a question Our experts can answer your...
What element has 6 protons? What element has 16 protons? What element has 81 protons? What is the ion symbol for an atom with 20 protons and 18 electrons? What is the total electric charge of 2.5 kg of electrons? What is the isotope charge of potassium-39?
What is the symbol for the ion with 19 protons and 18 electrons? What is the name of the element that has an atomic number of 8? What is the ion symbol for an atom with 20 protons and 18 electrons? Explore our homework questions and answers library ...
What is the main component of the atomic mass in English? A. Protons B. Electrons C. Neutrons D. Protons and neutrons 相关知识点: 试题来源: 解析 D。本题考查原子质量的主要组成部分。质子和中子的质量较大,是原子质量的主要构成部分,电子质量很小可忽略。选项 A 仅提到质子,不全面。选项 B 电子...
a毫无疑问 ) he is qualified for the job. Without a doubt) he is qualified for the job. [translate] aAn atom containing 34 protons, 43 neutrons, and 34 electrons would have what symbol? 包含34个氢核、43个中子和34个电子的原子将有什么标志? [translate] ...
Electron cyclotron maser emission is a type of electromagnetic radiation emitted by electrons as they move perpendicular to a magnetic field. The emission is in the form of photons, which are extremely energetic light particles. These photons can be detected by astronomical instruments and provide val...
ICSEC - Grade 09 - CHEMISTRY - Atomic Structure And Chemical Bonding - Q23
The Large Hadron Collider is mainly a machine for smashing protons into each other. But what's a proton? First and foremost, it's a mess. A total mess. As ugly and chaotic as a hydrogen atom is elegant and simple. Ok, then, what's a hydrogen atom? It
There is also such a thing asantimatter, which is not the same as dark matter. Antimatter consists of particles that are essentially the same as visible matter particles but with opposite electrical charges. These particles are called antiprotons and positrons (or antielectrons). When antiparticl...