An atom of an element has the following groundstate configuration: (Kr)4d^105s^25p^b. a. If the element is in Group 6A, what is the symbol of the element? b. What is b? What element is represented by the electron configuration 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 ...
Located within the nucleus of the atom, a proton has a relatively larger mass than that of an electron but slightly smaller than that of a neutron. A proton will always have at least one positive charge. The proton is responsible for the atom's atomic number. The positive proton charge ba...
3JA细节理解题。 根据文章倒数第二段最后一句 "The 226 neutrons in radium-226 make this atom glow in the dark.” 可知, 226个中子使得镭-226 在黑暗中闪烁, 所以A正确。 4]A细节理解题。 根据文章最后一段第二句话 "Once that happens, though, the pieces are no longer a part of one chemical...
An atom is a basic structural unit of matter, the smallest particle of an element ___ into chemical combination. A. that can enter B. can it enter C. when entering it can D. that E. nters can 相关知识点: 试题来源: 解析 A 答案:A 分析:that引导定语从句,element为先行词。the smalles...
The part of an atom in which alpha or beta particles originate in the nucleus. Beta particles are characterized as negatively charged particles. These...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer you...
Here we note the interesting fact that the numerator in the exponent of Eq. (40.1) is the potential energy of an atom. Therefore we can also state this particular law as: the density at any point is proportional to e^{−\text{the potential energy of each atom}/kT}. That may be an...
Explore the Materials——From an Atom to a Device(走进材料——从原子到器件) · 13篇 第二章 Chapter 2 Metals and Alloys 1.单选(2分) Metallic materials are mostly ___ in nature. A. non-crystalline B. pure metal C. crystalline D. ...
1.A nucleus (原子核) is about ___ of an atom(原子).A one million of B one million the siz
(v) Complete the diagram to show the electronic configuration of an atom of thorex, using x to represent an electron. 相关知识点: 试题来源: 解析 (i) Group 13 (ii) The element's position in Group 13 is due to its outer shell having 3 electrons. (iii) Period 3 (iv) Aluminum (Al)...
Students should consider how models of atomic structure have developed over time, as new evidence has become available. Know the structure of an atom in terms of electrons, protons and neutrons.CIE AS ChemistryIdentify and describe protons, neutrons and electrons in terms of their relative charges...