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Cover design Opening page Illustrations David Keller David Keller Rebecca W. Keller, PhD Copyright 2013 Gravitas Publications, Inc. All rights reserved. No part of this publication may be reproduced

FOCUS ON MIDDLE SCHOOL CHEMISTRY

Contents CHAPTER 1 MATTER 1.1 1.2 1.3 1.4 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 4.1 4.2 4.3 4.4 4.5 5.1 5.2 5.3 5.4 5.5 5.6 Introduction Atoms Periodic Table Summary From A

CHAPTER 6 MIXTURES 6.1 6.2 6.3 6.4 6.5 7.1 7.2 7.3 7.4 7.5 7.6 8.1 8.2 8.3 8.4 8.5 8.6 9.1 9.2 9.3 9.4 9.5 Introduction Types of Mixtures Like Dissolves Like Soap Summary Introduction Filtration Evap

2 FOCUS ON MIDDLE SCHOOL CHEMISTRY 1.1Introduction hat is chemistry Have you ever wondered what the world and the objects in the world are made of What is water exactly Why do ice cubes float What a

CHAPTER 1 MATTER 3 Today we know that atoms are composed of even smaller particles called protons prtnz,neutrons ntrnz ,andelectrons ilektrnz. Protons and neutrons are roughly equal in size, but ele

4 FOCUS ON MIDDLE SCHOOL CHEMISTRY 1.3PeriodicTable All of the atoms that make up the world are known. They are called chemical elements or just elements elmnts.Early in the 19th century, a total

CHAPTER 1 MATTER 5 As we just saw, the atomic number tells how many protons the atom contains. In an atom, the number of protons equals the number of electrons, so this number is also the number of

6 FOCUS ON MIDDLE SCHOOL CHEMISTRY The elements in the periodic table are arranged vertically according to their chemical properties.All of the elements in a single column undergo similar chemical r

CHAPTER 1 MATTER 7 1.4Summary Here are the most important points to remember from this chapter All things, both living and nonliving, are made ofatoms. Atoms are made of protons,neutrons,andelectr

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