Pure compounds and elements differ from mixtures in one key way: the substances in a pure compound are held together by chemical bonds. These chemical bonds cannot be broken. Since they contain a single substance only, elements cannot be decomposed by ordinary chemical methods, such as the appli...
the other substance D. others substance 相关知识点: 试题来源: 解析 B substance作“物质”讲时是可数名词。句意:一种物质如果没有和其他的物质混合,它就是一种纯的物质。根据语境可知,这里的“物质”应该是泛指而不是特指。所以,A、C两个选项都不对。而D项的表达本身就是错误的。反馈 收藏 ...
An ___ is a pure substance made of only one type of atom. 反馈 收藏 有用 解析 免费查看答案及解析 本题试卷 化学用语填空练习题 5399人在本试卷校对答案 18 4页 每天0.1元解锁完整试卷 最低仅¥0.1 思路解析 本题详解 Element 开学特惠 开通会员专享超值优惠 助力考试高分,解决学习难点 新客低价...
Which one of the following is a pure substance? A. concrete B. wood C. saltwater D. elemental copper E. milk 点击查看答案
A. the other substances B. other substances C. the other substance D. others substance 相关知识点: 试题来源: 解析 B substance作“物质”讲时是可数名词。句意:一种物质假如没有和其他的物质混合,它确实是一种纯的物质。依照语境可知,那个地点的“物质”应该是泛指而不是特指。因此,A、C两个选项都...
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aIdentification of the product 产品的证明[translate] aproduct Identification 产品识别[translate] ain case of pure product or substance, it is the mere chemical denomination of the commercialized product. 在纯净的产品或物质的情况下,它是商业化的产品的仅仅化工衡量单位。[translate]...
这结合以加速的“湿outperformance与一部透明影片的组合,做它理想为介入高清晰标记的应用[translate] a亚洲渔业水产与养殖论坛 Asian fishery aquatic product and cultivation forum[translate] aThe molecule is the smallest particle of a pure substance 分子是一种纯净的物质的最小的颗粒[translate]...
Is helium classified as a pure substance, a pure element, a homogeneous mixture, or a heterogeneous mixture? Is a pure silver ring classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? Explain. Is milk classified as a...
The main classifications of matter include the categories element and compound, either of which may also be called a substance (which is a less specific term), and mixture, of which there are also many sub-categories.Definition of a (Chemical) Mixture:...