In the early 1930s it was known that there were protons and neutrons inside the nucleus of the atom. It was also known that protons and neutrons had very similar masses. The mass difference between the proton and the neutron is quite small 鈥 1 part in 700 or so. And the forces ...
-句子1:The number of protons in an atom determines its atomic number.(原子中的质子数决定了它的原子序数。) -句子2:Protons and neutrons are located in the nucleus of an atom.(质子和中子位于原子的原子核中。) -句子3:Scientists are studying the behavior of protons under extreme conditions.(科学...
The total mass of an atom is determined very nearly by the total number of protons and neutrons in its nucleus. This total is called the mass number, A. The number of neutrons in an atom, the neutron number, is given by the quantity A-Z....
So iron nuclei of neutrons and protons than neutrons and protons in the nucleus of all other elements close to the more relevant, in which most of the strong force between protons and, which are arranged in the same direction, it also has the largest magnetic field. ...
The number of electrons in an electrically neutral atom is also equal to the atomic number, Z. The total mass of an atom is determined very nearly by the total number of protons and neutrons in its nucleus. This total is called the mass number, A. The number of neutrons in an atom, ...
We now know that atomic number (the number of protons in the nucleus), not atomic mass number (the number of protons and neutrons), determines chemical behavior. 问题 句子分析(俗称“长难句分析”)是训练提高基础阅读能力的有效手段。我们通过对托福(TOEFL)、雅思(IELTS)、GRE、考研以及四六级等考试中...
Protons and neutrons(together called nucleons)are held together in the nucleus of an atom by a force called the strong force. At very small separations, the strong force between two nucleons is larger than the repulsive electrical force between tw...
【题目】翻译一下可以吗1.An atom is made up of positive charges (protons),neutral charges (neutrons)and negative charges (electrons).T he protons and neutrons are found within the nucleus ofan atom,while we learnt in P08 Curious glowthat the electrons are found in different energy levels ...
百度试题 结果1 题目10 An isotope of element Y has 19 protons and 20 neutrons in its nucleus. Which is the symbol for the ion of Y? B2039A YB19192039C YD1919 相关知识点: 试题来源: 解析 B 反馈 收藏
In fact in a nucleus, protons and neutrons are exchanging a meson at extremely fast speeds, when the neutrons lose a meson becomes a Proton, when the Proton is a meson becomes a neutron. There is no doubt that being swapped is of positive charge. Due to due to the exchange of Mesons ...