u喜欢言情? [translate] aToday’s model of the atom has a concentrated nucleus containing the protons and neutrons surrounded by a cloud representing where the electrons are likely present. 原子的今天模型有一个被集中的中坚力量包含云彩和中子围拢的氢核代表电子是可能的存在的地方。 [translate] ...
Moments after the Big Bang, energy begins to condense into matter,protons and neutrons are formed, and then the first element (hydrogen) is formed. Hundreds of millions of years later in stellar nebulae, the hydrogen gas clouds coalesce and, under gravity, form protostars. ...
2024年公共英语考点真题库 [单项选择题]Where does this talk take place probably 关键词: Where place probably A. In the street. B. At a shoes shop. C. On the bus. 本题来源:2018年公共英语考试考前冲刺卷 查看最佳答案和解析
How to use a balance to find the mass of an object? Explain.Given that fluorine has an atomic number of 9, how are electrons placed into the orbitals? In what sense is the outer electron shell incomplete?An element has 43 protons a...
"The notion that there is a scientific consensus has been referred to as a gateway belief by people who study how the public thinks about climate change," Romps said. "They find that, if you can get people to understand that fact, it kind of pries the door open and makes them open to...