It took 380,000 years for the universe to cool enough to slow down the electrons so that the nuclei could capture them to form the first atoms. The earliest atoms were primarilyhydrogenandhelium, which are still the most abundant elements in the universe, according toJefferson Lab. Gravity ev...
the planet is so close to the sun that the solar wind blows away any gases that accumulate near the surface. The trace atmosphere of the planet includes small amounts of oxygen, hydrogen and helium. The combination of a large iron magnetic ...
What is the purpose of shielding gas for MIG welding? Welding produces a molten puddle made up of the base metal and filler metal being fused together. Shielding gas protects that puddle from atmospheric contaminants like nitrogen and hydrogen. Without shielding gas, the finished weld ...
I am wondering about this. It is a familiar sight, the orbital diagrams for the hydrogen atom, depictions of which are abundant and so are not in need of reproduction here. However, what about the "orbitals" for bigger, more complex atoms, say, Helium? I inquired ...
wordstome.Ihadnoideawhathydrogenwas,andI didn?treally wanttoknow,eitherIfounditallso 45. (bore)and difficult.But Mr Jenkins madeeverythinginteresting.Heusedtoexplainthings whichseemeddifficultwithlotsofpractical46. (example)andinsimplelanguage.Oneday,he tookusoutsideandwe47. (build)arocket! Irememb...
Although helium is one of the most mon elements in the universe it is a rare gas on Earth. The Sun and other stars are made mostly of helium and hydrogen. On the Earth helium occurs in natural gas deposits. Helium is a constituent of natural gas deposits ranging from a trace...
Fusionis the combining of two small atoms such as Hydrogen or Helium to produce heavier atoms and energy. These reactions can release more energy than fission without producing as many radioactive byproducts. Fusion reactions occur in the sun, generally using Hydrogen as fuel and producing Helium...
Living things, for example, are mostly made from the atoms carbon, hydrogen, and oxygen. These are just three of over 100 chemical elements that scientists have discovered. Other elements include metals such as copper, tin, iron and gold, and gases like hydrogen and helium. You can make ...
fifth planet from the sun, Jupiter is considered a gas giant because it has no solid surface. It is mainly composed of hydrogen and helium. The planet's colorful clouds are created by jet streams and huge, intense storms, such as the Great Red Spot, which has raged for hundreds of ...
Answer to: Using what you know about the Bohr model and the structure of hydrogen and helium atoms, explain why the line spectra of hydrogen and...