1. Question # 1 How do the physical properties of matter compare to the chemical properties of matter?

2. Question #2 Describe the basic structure of an atom:

3. Question # 3 Name the three basic subatomic particles and give their charges:

4. Question # 4 What is the difference between the atomic number, mass number, and atomic mass?

5. Question # 5 Explain how isotopes of an element differ from each other:

6. Question # 6 (True or False) An element is made up of only one kind of atom.

7. Question # 7 (True or False) The average atomic mass is equal to the number of neutrons in an atom.

8. Question # 8 (True or False) Atoms that have the same number of protons but different number of neutrons are called isotopes.

9. Question # 1 How do the physical properties of matter compare to the chemical properties of matter? Physical Properties can be observed without changing the composition of the substance. Chemical properties describe how a substance changes in a chemical reaction

10. Question #2 Describe the basic structure of an atom: Atoms consist of protons and neutrons in the nucleus surrounded by electrons that move in a cloud around the nucleus.

11. Question # 3 Name the three basic subatomic particles and give their charges: Protons – Positive Neutrons – Neutral Electrons – Negative

12. Question # 4 What is the difference between the atomic number, mass number, and atomic mass? Atomic number = number of protons Mass number = total number of protons and neutrons in the nucleus Atomic mass = determined by isotopes of the atom.

13. Question # 5 Explain how isotopes of an element differ from each other: Isotopes are the same atom with a different number of neutrons that change the mass of the atom.

14. Question # 6 (True or False) An element is made up of only one kind of atom.

15. Question # 7 (True or False) The average atomic mass is equal to the number of neutrons in an atom.

16. Question # 8 (True or False) Atoms that have the same number of protons but different number of neutrons are called isotopes.

17. What indicates that the pool is being heated? What does the orange color around the outside indicate?

18. We are completely surrounded by matter! Write down 3 examples of matter around you and list some of the characteristics of the matter. Once you are done with the above, list some things that are not matter.

19. Section 4.2-Earth Chemistry What is matter? – Matter is anything that takes up space and has mass. – Matter has observable and measureable properties. Two types of properties – Physical -- – Chemical --

20. Physical Properties Defined: Are characteristics that can be observed without changing the composition of a substance: – Density – Color – Hardness – Freezing/boiling point – Conductivity

21. Chemical Properties Defined: Characteristics that describe how a substance reacts with other substances in a chemical reaction. – Iron reacts with oxygen to form rust. – Can you think of others?

22. Elements Elements – – A substance that CANNOT be broken down into a simpler form. Each element has a set of physical and chemical properties.

23. Atoms! Atoms – – smallest unit of matter that has its own physical and chemical properties. Atoms are made of – PROtons – Positive Charge – NEUTrons – NEUTral Charge – Electrons – Negative Charge

24. Atoms Made up of the Nucleus – Nucleus includes almost all of the mass. – Is composed of PROTONS and NEUTRONS Electron Cloud – Surrounds the nucleus – Made up of electrons floating in orbits around the nucleus.

25. Example of an Atom

26. Atomic Number/ Atomic Mass Atomic Number – Number of Protons Atomic Symbol Atomic Mass – Protons + Neutrons 12 Mg Magnesium 24.3050