Chemistry问题1:An element is a substance that is made up of only one kind of atoms.One kind是指同一个的atom,还是Metal或者non-metal两大类中的一类?2:an element=an atom?有什麼分别?最好举个例子. 相关知识点: 试题来源: 解析 1.化学元素是根据原子核电荷的多少对原子进行分类的一种方法,把核...
Atoms and Bonding The Building Blocks of Matter Matter may consist of elements, compounds, or mixtures. Element: a substance made of only one type of atom Compound: a substance made of two or more elements chemically bonded together. Mixture: a physical combination of two or more pure substan...
2No matter what substance it may be, it is ___ atom. A.resulted fromB.formedC.made up ofD.made up with 3 No matter what substance it may be, it is ___ atom. A.resulted from B.formed C.made up of D.made up with 4No matter what substance it may be, it is___ atom. ...
相关知识点: 试题来源: 解析 【解析】C【解析】试题分析:原句意思是,不管它是什么物质,它构成了原子。resultfrom意思是由……引起form形成,这里使用了被动语态,所以排除B,be made up of构成made up with与……和解。故选C,最符合题意。 反馈 收藏
So, is copper a pure substance or a mixture?Yes, copper is a pure substance as copper has definite properties. It is made up of only one kind of atom. A substance having one or more atoms in the same proportion throughout the substance is a pure substance. ...
A-level化学:摩尔和阿伏伽德罗常数。-The Mole and Avogadro’s Constant- One mole of a substance contains 6.02×10236.02×1023 particles. T - Overseas Math于20250102发布在抖音,已经收获了6个喜欢,来抖音,记录美好生活!
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Atoms are building materials of all matter, because by putting together atoms in different ways, all elements and compounds can be formed. An element is a substance or a kind of thing that has only one type of atom. Pure oxygen has only oxygen atoms.
No matter what substance it may be, it is___atom. A.resulted fromB.formedC.made up ofD.made up with 试题答案 在线课程 C 试题分析:原句意思是,不管它是什么物质,它构成了原子。result from意思是由 …… 引起form 形成,这里使用了被动语态,所以排除 B ,be made up of 构成made up with 与…...