1. Unit 6Whole as Sum of Parts Chapter 3 Lesson 1 pp. 130-137

2. Basic Properties of Matter • Matter is anything that that has mass and takes up space • Properties of matter • Solubility • Mass • Hardness (Density) • Take up space

3. 3 States of Matter • Solid • Liquid • Gas

5. Particles of Matter • Democritus(a Greek thinker) thought matter was: • Made of tiny particles, or bits • Different kinds of matter are made of different kinds of particles • Particles could not be broken down into smaller parts

6. The smallest possible particle of a substance is an atom. • Atoms are made of • Protons (positive charge)- located inside the nucleus • Neutrons (neutral (no) charge)- located inside the nucleus • Electrons (negative charge)- move around the outside of the nucleus

7. Atoms- Atoms have a nucleus that contain protons and neutrons -electrons orbiting the outside of the atomThe attraction between the protons and the electrons keeps the atom together

8. A molecule is made up of 2 or more atoms joined together. • Atoms and molecules are do small they cannot be seen with a regular microscope because they do not reflect light. • Atom means “cannot be divided”

9. Elements • An element is a substance that is made up of just one kind of atom • There are 116 elements • Examples: • Mercury • Iron • Silver • Gold • Hydrogen • Oxygen

11. Some Groups of Elements • Scientists have grouped elements together • Example: Metals and nonmetals • However, not all metals are elements- such as steel (it is made of the elements iron and carbon) • http://www.hpwt.de/Chemie2e.htm

12. Metals • Metals are: • Shiny • Malleable- they are easy to shape or form • Ductile- they can be pulled into long thin wires without breaking

13. Nonmetals • Nonmetals are: • Not shiny • Brittle –cannot be pounded without breaking • Don’t conduct electricity well

14. Noble Gases • Noble Gases (neither metals nor non-metals) • Colorless • Odorless • Some glow when electricity is added (neon and argon)