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Chapter 19

Chapter 19. The Representative Elements: Groups 1A Through 4A. 19.1 Survey of the Representative Elements. Elements in group 1A through 8A are called representative elements because they display a wide range of physical and chemical properties.

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Unit H9

Unit H9. Shampooing and Conditioning. What is the purpose of shampooing ?. To clean the hair and scalp To improve the condition of the hair and scalp To prepare for further hairdressing services To remove products from the hair. What is shampoo?.

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Water hardness & Special treatment

Water hardness & Special treatment. Introduction. Water described as "hard" is high in dissolved minerals, specifically calcium and magnesium. Hard water is not a health risk, but a nuisance because of mineral buildup on fixtures and poor soap and/or detergent performance. Water hardness.

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Permanent hard water - PowerPoint PPT Presentation

Chapter 19

Unit H9

Water hardness &amp; Special treatment

Water hardness & Special treatment