This chapter discusses the atoms, molecules, compounds, and mixtures. Atoms have been defined as the smallest parts of matter that cannot be changed by chemical means. In nature, the inert gases neon, argon, krypton, and xenon together with helium exist in nature as single uncombined atoms. ...
Atoms, Molecules, and Compounds 作者:Manning, Phillip 出版社:Facts on File 出版年:2007-10 页数:137 定价:$ 39.55 装帧:精装 ISBN:9780791095348 豆瓣评分 目前无人评价 评价: 写笔记 写书评 加入购书单 分享到 + 加入购书单
Molecules Elements Periodic Table Natural elements Synthetic or man-made elements Compounds Mixtures Atoms An atom is a basic unit of matter that consists of a central nucleus surrounded by negatively charged electrons. The nucleus contains protons and neutrons. Electrons revolve around the nucleus in ...
Molecules, being composed of bonded atoms, can undergo chemical reactions as well. The nature of these reactions depends on the types of atoms involved and the bonds between them. Molecules can react to form new compounds, break apart into their constituent atoms, or rearrange their atomic compos...
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Some compounds are collections of positively and negatively charged atoms called ions. These are called ionic compounds. For molecular compounds, the smallest unit is the molecules. For ionic compounds, the smallest unit is the formula unit, which is the lowest whole number ration of the ions ...
书名Atoms, Molecules, and Compounds 作者Phillip Manning ISBN: 0791095347 128 pages 目录Meet the Atom 1 The Quantum Model 15 The Nucleus 29 The Electrons 42 The Elements 58 Chemical Reactions: Making Molecules 71 Chemical Bonds 81 Common Compounds, Uncommon Results 102 Periodic Table of the ...
molecules (molecules consisting of two atoms) or polyatomic molecules (which contain more than two atoms). We refer to the compounds composed of molecules as molecular compounds. When an atom gains one or more electrons it acquires a negative charge and is known as an anion; when an atom ...
A. atoms B. molecules C. reactants and products D. elements and compounds 相关知识点: 试题来源: 解析 C。化学方程式展示了反应物和产物之间的关系,“atoms”是原子,“molecules”是分子,“reactants and products”是反应物和产物,“elements and compounds”是元素和化合物。反馈...
2.3Atoms and molecules 2.3Atomsandmolecules Review Whatispuresubstance Apuresubstanceconsistsofonlyonesubstance.Whichoneispuresubstance?oxygenSodiumchloride Elements:substancesthatcannotbechemicallybrokendownintosimplersubstances.Compounds:puresubstancesmadefromtwoormore,elementschemicallycombined together.Elementsand...