Lesson1-1:Classificationofmatter 物质：matter纯净物：substance 混合物：mixture化合物：compound 单质：element matter（物质）Anythingthathasbothmass(质量）andvolume（体积）.Examples:Sodiumchloride(NaCl)Oxygen(O2)Substance（纯净物）Matterwithconstant(恒定的）composition（组成）.Allparticles(成分)havethesame...
1、Christine Wang General General chemistrychemistryGeneral chemistryAP A-Level K-12SAT ACTBasic bilingual chemistry基础双语化学课程基础双语化学课程Lesson 1-1: Classification of matter 物质物质:matter 纯净物:substance 混合物:混合物:mixture单质:element 化合物:compoundmatter(物质)Anything that has both mas...
Pure Substances A pure substance is a type of matter with a fixed composition. Examples: water, salt, sugar An element is a substance in which all atoms have the same identity. Examples: gold, oxygen, aluminum About 90 elements occur naturally, another 20 have been made by man. Chem-Phys...
When classifying matter, the material under investigation may be reduced to its atomic structure. The atom is the most basic structure of the material which may be viewed as the element of the material. Copper (Cu), oxygen (O), and tin (Sn) are examples of elements. Combining of elements...
Classification of Matter Matter Substance Mixture Cannot be broken down further and still retain the same properties Substance Compound Element Two or more elements chemically combined together. Ex: H2O, NaCl If all atoms are the same are in the same amount in all parts of the mixture Two or ...
beyond the scope of this course,but we wi l l offer a hint of it in the later section on atomic structure.For the moment, let’s side-step definition of matter and focus on the chemist’s view:matter is what chemical substances are composed of.But what do we mean by chemical ...
from every other kind of matter. Some intensive properties can be determined by simple observations: color (absorption spectrum), melting point, density, solubility, acidic or alkaline nature, and density are common examples. Even more fundamental, but less directly observable, is chemical composition...
The characteristics of the subject matter will also need to be considered since you do not want to choose a topic with barely any comparative qualities. Bearing in mind the number of words required for the assignment, you do not want to struggle too much finding useful content online. ...
It is essential to choose a subject matter that can be of social relevance, something that is relatable for everyone. It will also help if the subject you choose to write on contains new information that contributes to improving professional knowledge. This is especially good when you are writin...
Body Paragraphs– The body of your essay will be 3 or more paragraphs. Each paragraph should deal with a different category. Start by explaining the criteria for each of them and perhaps discuss the strengths or weaknesses. You should also offer relevant examples. Depending on the length of ...