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...
Which one is not the typical property of metallic materials? A. solid at room temperature B. ductile C. good electrical and thermal conductors D. brittle 6.多选(3分) Because of the strong bonding, metallic materials usually have high packing density. Typical lattice structures of me...
An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom. View Solution The atomic number of an element is 34 and the mass number is 79. The number of electrons in the outer most shell is: View Solution ...
(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)...
百度试题 题目As we known,electrons revolve about the___of an atom.众所周知,电子围绕原子核。相关知识点: 试题来源: 解析 nucleus,or center, 反馈 收藏
An atom's electron configuration refers to the locations of the electrons in a typical atom. Using the electron configuration and principles of physics, chemists can predict an atom's properties, such as stability, boiling point and conductivity, according to theLos Alamos National Laboratory. ...