PPT-Pure Substances and Mixtures

Pure substances cannot be broken down by physical means Pure substances contain only one kind of molecule Molecules are small groups of atoms that make up matter Example Water is a molecule of two hydrogen atoms and one oxygen atom. Chapter 9.3 Part 1. Q: What is the dullest element? A: . Bohrium. . Key concepts:. Describe 3 properties of mixtures. Describe 4 methods of separating mixtures. Give everyday examples of mixtures. Key Vocabulary:. Grade 7 Science: Pure Substances and Mixtures. Ms. Willis. Mixtures in Industry. Learning Goal: To identify some industry applications of separating mechanical mixtures and solutions.. Mixtures in Industry. Mixtures may be separated by many different techniques based on differing physical and/or chemical properties. Sorting. Simply picking apart the different components. This can be easy and obvious…. Chapter 2. Bamboo has properties that make it a good choice for use in chopsticks. It has no noticeable odor or taste. It is hard, yet easy to split, and it is heat resistant. You will learn how properties can be used to classify and identify matter.. August 31. How do you separate?. How can you separate mixtures?. Separating. Separating is based on the difference in . physical properties . of the substances…. Think about how you would separate a bag of m&ms. Mixtures. Separation. of Mixtures. Atoms & Molecules. Matter. Pure Substances. Mixtures & Solutions. Compounds. E. lements. Heterogeneous. Homogeneous. Pure Substances. Definition:. A substance that cannot be separated by a physical or mechanical process, (by hand or with a tool).. Divisions of Matter. Pure Substance. Cannot be broken down and retain its properties.. Has a fixed composition.. Every sample of a pure substance has EXACTLY the same composition AND exactly the same characteristics - homogeneous. How can matter be classified?. Atoms . are the smallest unit of an element that maintains the properties of that element.. The most basic ingredients to . all . matter. Atoms can be combined in three majors ways:. Boiling point and melting Point -. What state would this element be in at room temperature?. BP = 150. o. C, MP = -23. o. C. Core practical: chromatography - . a. nnotate the chromatogram with everything you can tell from it (including . th. Grade Science. What are “Substances”? . Substances can be identified as either…. Elements. Compounds. Mixtures. So, what is a substance?. A substance cannot be further broken down or . p. urified by physical means.. Properties of matter . What do you see when you look at matter? . Properties used to describe matter can be classified as either:. Extensive . Intensive . Extensive vs. intensive properties. Extensive. Matter. -. anything that has mass and takes up space. .  . Properties of Matter . -Matter can have many different properties or characteristics. -. Chemistry. . is the study of the properties of matter and how it changes. UEQ: How does the structure of matter influence its physical and chemical behavior?. LEQ: How is matter classified?. Bell Work 09/19/2012. Write question and answer.. Can you chemically break down an atom? Why or why not? . Keywords. :. DATE. Learning Objectives. Recognise the difference between materials, substances and . elements . Identify . elements by their names and . symbols. Explain . what is meant by a chemically pure substance.