1. Matter and Energy
Mrs. Quezada

2. Basic Chemistry Chemical reactions take place for two main reasons:
To build new materials
To breakdown material into a useful form

3. Key Terms Matter- anything that has mass and takes up space
2) Energy- the capacity to do work
Types of Energy-
Potential-
Kinetic-

4. Energy can be easily converted from one form to another
Energy cannot be created or destroyed, but some energy is lost as heat during conversion

5. Matter has chemical and physical properties
Chemical properties-

6. 3) Elements- unique substances that cannot be broken down by ordinary chemical means 4) Atoms- identical building blocks for each element Atomic symbol- one or two letter shorthand for each element

8. Major elements of the Human Body

9. Lesser Elements of the Human Body

10. Aim: What is the structure of an atom?
Do Now: Describe the physical properties of the element on the front table- what element do you think it is? Homework: read pages 4-9 in book and answer all questions, define matter, mass, and weight in your notes

11. Atomic structure
Atoms consist of a nucleus and electrons orbiting the nucleus
The nucleus is made up of protons (+) and neutrons (no charge)

12. Electrons have a negative charge and are found orbiting the nucleus in electron shells (energy levels)
Bonds are formed using the electrons in the outermost energy level- valence electrons

13. Atomic number- number of protons an atom has
Mass number- number of protons and neutrons an atom has
Atomic weight- mass number

14. Types of bonds
Ionic bonds-
Covalent bonds-
Hydrogen bonds-

16. Key Terms Molecule- two or more atoms held together by chemical bonds
Compound- two or more different kinds or atoms held together by chemical bonds

17. Mixture-
Solution-
Colloid-
Suspension-