百度试题 题目The lightest element is Hydrogen, the atom consists of a nucleus of only one proton, around evolves one electron A. of which/which B. its/which C. whit 相关知识点: 试题来源: 解析反馈 收藏
Now imagine if you can (and of course you can't) make smaller one of those protons down to a billionth of its normal size into a space so small that it would make a proton look huge.Now pack into that tiny,tiny space some matter.Excellent.You are ready to start a standard Big Bang...
Thomas-Fermi model/ hydrogen atomtwo-body modelproton interactionshort-range nuclear soft-core Reid potentiallong-range Thomas-Fermi potentialquantum mechanical analysisIt is assumed that the total potential of proton interaction with a hydrogen atom is the sum of the short-range nuclear soft-core ...
Now imagine if you can (and of course you can’t) make smaller one of those protons down to a billionth of its normal size into a space so small that it would make a proton look huge. Now pack into that tiny, tiny space some matter. Excellent. You are ready to start a standard ...
Atom (原子)被认为是the smallest part of an element that has the properties of that element,它自身又由proton (质子), neutron (中子)和electron (电子)组成。虽然electron的质量仅为proton or neutron的1/1836,但它在许多方面(e.g. ionisation ene...
Electrocatalytic water dissociation consists of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is an efficient process to create valuable fuels. But the slow OER reaction kinetics attributed to the multiple proton-coupled electron transport reaction and a high theoretical potential...
The Nδ1 atom of H182 performs nucleophilic attack on a hydrogen atom attached to C2 of the decanoyl chain and extracts one proton from the substrate. The other proton and two electrons are transferred to FMN. One pair of proton/electrons is held by FMN, forming the reduced FMNH• ...
proton and electron charges were the same to within 5 parts in 1021, assuming that matter was built entirely of protons and electrons. Since matter also contains neutrons, they have assumed in effect that the neutron has a charge equal to that of a hydrogen atom; but the neutron might ...
13), with chlorine occurs by the oxidation of the thioether sulfur atom with the formation of sulfoxide and disulfoxide derivatives. Only after that the electrophilic substitution of chlorine for α-hydrogen with respect to the amide group takes place [159]. The reactivity of trimethoprim (Fig. ...
If the carbon-bound hydrogen atom is sufficiently activated (pKa < 30), as for amino acids and mandelic acid, it can be abstracted as a proton, generating an anionic intermediate. The anion derived from amino acids is often stabilized by a pyridoxal phosphate (PLP) cofactor in PLP-...