Which element has an atomic number of 1? Which element has an atomic number of 12? Which element has atomic number 19? Which element has an atomic number of 79? Which element has the atomic number 43? Which element has atomic number 20? Which element has the atomic number 9? What chemi...
Silicon has total 14 electrons in its isolated atom. The first orbit consists of 2 electrons. The second orbit consists of 8 electrons and the third orbit consists of 4 electrons. As there are four electrons in the outer most orbit of a silicon atom, the silicon is a tetravalent element....
Define the atomic mass of an atom. What constitutes the atomic weight of an element? A typical neutron-initiated fission of 235 U yields 97 Mo, two neutrons, and an isotope of what element? Which element has 32 protons? How many neutrons and electrons does a neutral atom of this element...
An element is a substance completely made up of one atom. Thus, the periodic table of elements is effectively a list of all known types of atoms. However, the atom itself is not the smallest known particle, but instead each atom is made up of three individual parts: electrons, protons an...
百度试题 结果1 题目6 An atom of element Q contains 19 electrons, 19 protons and 20 neutrons.What is Q?B A calcium B. potassium c strontium D. yttrium 相关知识点: 试题来源: 解析 B 反馈 收藏
In order for the product to be a square, another element of the sequence must also be divisible by the same prime; but this implies (iii). From (1) we see that the number of for which (i) occurs is at most . From the union bound we see that the number of for which (ii) ...
Orbital notation is the visual way to represent the electron configuration of an element. Electrons in orbital notation are represented by arrows. Carbon has six electrons.Answer and Explanation: The orbital notation for carbon is: Carbon's six electrons are represented in the diagram (arrows). ...
Pick an element of each , then we have whenever . In particular, one can find a set in the ultrafilter such that whenever and , and by taking suitable intersections that these sets are nested: . If we now define to equal for (and leave undefined outside of ), one can check that ...
In any atom, like charges repel one another, and opposite charges attract one another. This is why two protons repel each other and so do two electrons, but a proton and an electron attract each other. In an element, the numbers of electrons and protons are equal. Moreover, since they...
Every element has a unique atomic number. This is the number of protons in the nucleus of each atom. What is the atomic number of this helium atom? A neutral atom must have equal numbers of protons and electrons, so the atomic number of an element also gives ...