An atom is made up of ___. A. protons, neutrons and electrons B. protons and neutrons only C. neutrons and electrons only D. protons and E. lectrons only 相关知识点: 试题来源: 解析 A。原子由质子、中子和电子组成。选项 B、C、D 都不完整。反馈...
【题目】翻译一下可以吗1.An atom is made up of positive charges (protons),neutral charges (neutrons)and negative charges (electrons).T he protons and neutrons are found within the nucleus ofan atom,while we learnt in P08 Curious glowthat the electrons are found in different energy levels ...
百度试题 结果1 题目An atom___three kinds of particles. A. makes up B. is made of C. is consisted of D. is composed of 相关知识点: 试题来源: 解析 D 反馈 收藏
ICSEC - Grade 09 - CHEMISTRY - Atomic Structure And Chemical Bonding - Q23
An atom itself is made up of three tiny kinds of particles called subatomic particles: protons, neutrons, and electrons. Are atoms actually Uncuttable? Atoms are too small to see, “uncuttable,” and indestructible. All atoms of a given element are exactly alike and atoms of different ...
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 smallest...
An atom has three types of very tiny particles called protons, neutrons and electrons. The center of an atom is called the nucleus, and it is made up of protons and neutrons. The electrons in an atom fly around and above the nucleus in a cloud-like formation. The protons have a positiv...
All substances are made up of tiny particles called atoms.the center of an atom is known as the nucleus the nucleus is very dens 翻译这段话 相关知识点: 试题来源: 解析 所有物质都是有一种叫做原子的微小颗粒组成,原子的中心是原子核,其密度非常大 另外,个人认为你最后一个词打错了 分析总结。
What changes when an ion is made from an atom? A. the number of electrons only B. the number of neutrons only C. the number of protons only D. the number both of protons and of neutrons 相关知识点: 试题来源: 解析 A 考查实际运用。A. 仅电子数量(变化),B. 仅中子数量(变化),C. ...
Atoms are the basic units of matter. Everything in the universe apart from energy is made of matter therefore atoms make up everything in the universe, according toNorthwestern University. The term "atom" comes from the Greek word for indivisible, because it was once thought that atoms were ...