百度试题 题目As we known,electrons revolve about the___of an atom.众所周知,电子围绕原子核。相关知识点: 试题来源: 解析 nucleus,or center, 反馈 收藏
Describe the structure of an atom.An atom consists of a nucleus, which contains protons and neutrons, surrounded by electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. The number of protons determines
The majority of an atoms' mass comes from the protons and neutrons that make up its nucleus. Electrons are the least massive of an atom's constituent particles, with a mass of 9.11 x 10-31kg and a size too small to be measured by current techniques. Protons have a mass that is 1,83...
(1) Atoms and Electrons (2) The Atom and the Bohr Theory of its Structure: an Elementary PresentationSCIENCE is steadily becoming severely specialised. The proportion of amateurs (in the restricted sense of the word) among original workers of all ranks decreases slowly but surely....
百度试题 题目 Besides the electrons, an atom also contains positive electrical particles()total charge must be equal to that of the electrons. A. which B. that C. whose D. of which 相关知识点: 试题来源: 解析 C 暂无解析 反馈 收藏 ...
结果1 题目 Electrons orbit around the center of the atom, much___the planets in the solar system orbit around the sun. A. alike B. as C. looking like D. similar to 相关知识点: 试题来源: 解析 B 涉及知识点:语法 反馈 收藏 ...
Besides the electrons, an atom also contains positive electrical particles()total charge must be equal to that of the electrons. A. which B. that C. whose D. of which 如何将EXCEL生成题库手机刷题 如何制作自己的在线小题库 > 手机使用 分享 反馈 收藏 举报 ...
the number of electrons in an atom我应该怎么回答?题目有给出些元素和他们的原子序数 相关知识点: 试题来源: 解析 对中性原子来说,电子数等于电子序数.对离子来说,原子序数等于电子数加电荷数(阳离子)或电子数减电荷数(阴离子). 分析总结。 对离子来说原子序数等于电子数加电荷数阳离子或电子数减电荷数阴...
True or false? The energies of an atom's electrons are quantized.Bohr's Atomic Model:The atom's structure is described by the Bohr model, which is based on quantized electron orbits or energy levels. The Bohr model, while successful in explaining certain aspects of atomic behavior, has ...
14. One o f the principal applications o f the diode (二极管)is in the production of a de voltage from an ac supp ly (交流 电源 ),a process called rectif ication (整流 ). 15. The gain o f electrons by an atom leads to the formation o f a negative ion (离子 ). 16. This ...