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 ...
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...
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 to the electroscope; Reactions of positive charges versus those of negative charges.Noll...
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. ...
(charge) overnight, the electric car now has enough power for a long-distance journey. (所给词的适当形式填空) 相关知识点: 试题来源: 解析 Charged 【详解】 考查过去分词。句意:经过一夜的充电,这辆电动车现在有足够的电力进行长途旅行。此处为非谓语动词作状语,charge与逻辑主语the electric car构成...
立即购买 购Surface Laptop商城专属机型立减3148元 12核Snapdragon X Elite /15 英寸/ 64GB内存/1TB硬盘,功能异常强大的超薄笔记本电脑。 使用Microsoft 365 充分利用每一天 只要购买一项计划,即可享受在线保护、安全的云存储空间和多款创新应用,满足你的各种需求。