If you look at a periodic table, you will notice helium on the opposite side, but the same row as hydrogen. Helium and hydrogen alone sit at the top of the entire spectrum of elements. Why is that? Although this will be discussed in greater detail in Chap.聽2, quite simply, they ...
34. What is helium-3 as fuel expected to be like? A. It is clean and safe. B. It is low in cost. C. It absorbs radiation. D. It produces no waste. 相关知识点: 试题来源: 解析 【答案】A【核心短语/词汇】fuel燃料【翻译】氦-3作为燃料有望是什么样的?【解析】根据第四段最后一句“...
Helium:Helium is a chemical element that has the atomic number 2. Its symbol is 'He.' Helium was first discovered in 1868 by Jules Cesar Janssen during a solar eclipse.Answer and Explanation: Helium is a major component of stars, such as our Sun. In fact, helium is the second most ...
The planet Uranus has an atmosphere that is made up of helium, hydrogen and a small amount of methane. The methane causes Uranus to appear a beautiful bluish-green color. Answer and Explanation: Learn more about this topic: Uranus | Characteristics, Rings & Rotation ...
Shortwritingsmissedasaresultofanexcused absencewillbeaccepted. 1.Whereisthistextprobablytakenfrom? A.Atextbook. B.Anexampaper C.Acourseplan. D.Anacademicarticle. 2.How manypartsisastudent?sfinalgrademade upof? A.Two. B.Three. C.Four. D.Five. 3.Whatwillhappenifyousubmitanessayone weekafterth...
What is the reality of actually using Helium-3. The reality is not so clear-cut. The most advanced fusion programs in the world are inertial confinement fusion (such asNational Ignition Facilityand magnetic confinement fusion (such asITERand other. In the case of the former, there is no sol...
though ultimately it must be brittle enough to let the chick break free. The secret is thanks to a complex nanostructure, which allows the shell to serve both purposes. Now, new research has offered an in-depth glimpse at how the structure of eggshells actively changes as embryos incubate and...
Student: Something like “Helius” or something like that.Oh, it must be “Helium”.So you are saying that Helium was discovered on the sun first. Professor: Yes, and this is a good example of how important spectroscopy is in astronomy. ...
A molecule, such as H20, is the smallest unit of a compound that maintains the characteristics of that compound. A compound often looks and behaves differently from its constituent elements. Consider a water (H2O)molecule, which is made up of two hydrogen atoms and one oxygen atom. Both hydr...
The ultimate source of energy for humans comes from what source? What does the sun consume to produce energy and helium? How does the sun produce energy? What makes up the sun? What is the ultimate source(s) of energy that drives all processes on Earth?