求语法题a proton has a positive charge and an electron a negative charge,but a neutron has a neither b both WHY? 答案 质子带正电,电子带负电,中子不带电(正负电都不带).Neither就是都不的意思,所以选A相关推荐 1求语法题a proton has a positive charge and an electron a negative charge,but ...
Put a proper word on each blank. 质子带正电,电子带负电,而中子既不带正电,也不带负电。 译:A proton has a positive charge and an electron a negative charge, but a neutron ___ ___.相关知识点: 试题来源: 解析 has;neither 反馈 收藏 ...
An atom is a basic constituent of matter that consists of a positively-charged core (nucleus) surrounded by a cloud of negatively-charged electrons. By definition, atoms are neutral entities because the positive charge of the nucleus is cancelled by the negative charge of the electron cloud. How...
An atom with a positive charge has more protons than electrons. Atoms are electrically neutral because they have equal numbers of protons and... Learn more about this topic: Atomic & Mass Number | Overview & Difference from Chapter 2/ Lesson 1 ...
Da deficiency of 8 electrons Submit The ratio of specific charge of an electron to that of a protons is View Solution Nitrogen has positive electron gain enthalpy whereas oxygen has negative. However, oxygen has lower ionisation enthalpy than nitrogen. Explain. ...
Reports on how the electroscope aids in the identification of an electrical charge. Components of an electroscope; Charging an electroscope with a positive charge; Bringing the material to be tested close...
Today'sfigures, according to one government official, show the positive influence the sugartax is having by raising millions of pounds for sports facilities（设施）and healthier eating in schools.据一位政府官员说，现在的数据显示了糖税的积极影响，税收有通过提高数百万英镑的体育设施(设施)和在学校的...
He has a terrible experience of (charge)with stealing things. 相关知识点: 试题来源: 解析 1.being charged 考查非谓语动词。句意:他有过被指控偷窃的糟糕经历。分析句子结构可知,句子成分完整,所以需要填入非谓语动词,又因为在介词of后,所以用动名词形式;由于主语"he"和"charge"为被动关系,所以要用动名词的...
A8 Metal X has a charge of +2 while metal Y has a charge of +3 in all their compounds. Melal X lies between potassium and aluminium, and meta! Y lies between zinc and lead in the reactivity series.(a) How can metal X be extracted from its ore?(b) Suggest one method to pr...
“My cellphone charge is overdue.” charge 费用,一般都是那种有账户的,在账户上进行的缴费的费用,作动词还可以指充值 overdue 逾期 开机/关机 PART.02 turn on/off your phone power/switch on/off your phone 一般来说,如果我们想要表达电子设备的开关,比如开/关灯,开/关电视机,直接用open/close来表达,都...