【答案】(a)Electron(b)Neutron(c)①Thenumberofprotonsisnotequaltothenumberofneutrons.②Thenumberofelectronsisnotequaltothenumberofprotons.③Thetotalnumberofparticlesisnot 20.④Thenumberofneutronsisnotequaltotheatomicnumber.【解析】(a)原子的质子数等于原子序数,题目中要求的是质量最小的粒子,所以是电子,故...
解析 1) Proton number = number of protons = 17 Nucleon umber = number of protons + number of neutrons = 17+18 =35 2) N.O.Protons = proton.num =3 Atom is neutral.Therefore,number of neutrons = nucleon num - proton num = 7-3=4...
Heisengagedintheresearchinthefieldsofmobilecommunication,personalcommunication,andsoon,Hehasobtainedone“NationalInvention〞patentandwonquiteafew⑥ScienceandTechnologyProgressAwards⑦atprovincialandministeriallevels.Independentwork2 1、文革前，我校的学生数仅为现在的三分之一。2、这台计算机所存储的信息是那台的三...
This is because the center of neutrons and protons in a powerful electrostatic repulsion under high speed after flying off in a specific context, namely when the velocity of the neutron and Proton dropped when both can be combined freely, with the surrounding accretion disk of material produced ...
aHarry was a humble man. One day I complained when asked to sweep the store and Harry told me,"Kid,it is part of the job,and besides,you are being paid."He would grab the broom and start singing.I was always attracted by how this gentle man could persuade an unpleasant task into ...
MALE PROFESSOR: And it's arranged according to increasing atomic number, which is … ? FEMALE STUDENT: The number of protons in each atom of an element. MALE PROFESSOR: Right.Well, early versions of the periodic table had gaps. Missing elements.Every time you have one more proton you have...
2 This question is about hydrogen, the element with atomic number Z =1.(a)(i) Hydrogen has two stable isotopes, H and H. Complete the table to show the number of subatomic particles present in the nuclei of these two isotopes of hydrogen.(1)Isotope Number of protons Number of neutrons...
awith a number of protons and neutrons that have half-lives of minutes or days 与有分钟或几天半衰期的一定数量的氢核和中子[translate] asitting, make phone calls, tell driver to deliver the coconuts 正在翻译,请等待... [translate] a她今天早上吃饭了吗?是的,他吃了 She has eaten meal this ...
description (描述).Everything in the world is made of atoms(原子).In every atom,there are electrons(电子),protons( 质子) and neurons(中子).In some atoms,it is possible to move electrons easily from one atom to another.As the electrons move,a current(电流) is created.This...
【题目】" Even though as the record shows this man does not have very good , known him for some years, stupid. This is from a graduate student's recommendation letter for the University of Rochester, This" not completely student is Japanese physicist-Masatoshl Koshiba, who wasa co-winner ...