Chemistry – Classes 16 & 17
Period B – Thursday-Friday, September 26-27
Exam Preparation
- Chapter 3 Exam on Friday
- Practice Problems from textbook
- 41, 42, 53, 58, 67, 71, 73, 76
- support every answer
- Big Ideas from the Chapter
- Solids, liquids, gases all have different properties
- Physical properties can be observed without altering substance
- Chemical properties describe a substance’s ability to combine with other materials
- Physical changes alter physical properties
- Chemical changes involve changes in composition
- Chemical reactions change reactants to products
- Law of Conservation of Mass – the mass before a reaction equals the mass after a reaction
- Mixtures are blends of substances in any proportion
- Solutions are homogeneous mixtures
- Mixtures are separated by physical means
- Elements cannot be broke into simpler substances
- Elements are organize don the periodic table
- compounds come form combinations of elements
- Law of Definite Proportion – the formula for a substance never changes
- If you can do the practiec problems then you can do the exam
Homework
- Study for the exam
- turn in the practice problems with the exam
