1. + Chapter 4 Review

2. + Vocabulary Review! Matter Anything that has mass and takes up space.

3. + Vocabulary Review! Atoms Very small particles that make up all matter

4. + Vocabulary Review! Nucleus The center of the atom. Protons and neutrons are located here. Contains most of the mass of the atom.

5. + Vocabulary Review! Proton Located in the nucleus. +1 charge 1 amu mass

6. + Vocabulary Review! Neutron Located in the nucleus. 0 charge 1 amu mass

7. + Vocabulary Review! Electron Located in the space around the nucleus. -1 charge 0 amu mass

8. + Vocabulary Review! Subatomic Particles Protons, P+ electrons, e- Neutrons, N

9. + Vocabulary Review! Electron Cloud Region surrounding the nucleus of an atom where an electron is most likely to be found

10. + Vocabulary Review! Compound Two or more atoms chemically connected

11. + Vocabulary Review! Atomic # The number of protons an atom has The top number on the periodic table squares

12. + Vocabulary Review! Mass # The sum of protons and neutrons an atom has. The bottom number on the periodic table squares

13. + Vocabulary Review! Isotopes Atoms of the same element containing a different number of neutrons

14. + Vocabulary Review! Cation A positive ion, caused by losing 1 or 2 electrons.

15. + Vocabulary Review! Anion A negative ion, caused by gaining 1 or 2 electrons.

16. + What did Thomson discover? electrons

17. + What did Dalton’s model of the atom look like? Like a marble

18. + What is the atomic number of Selenium?

19. + Write down an example of matter Anything: Pencil, Person, Air, Table, Etc.

20. + What did Thomson’s model of the atom look like? Like a chocolate chip cookie

21. + What is the name of our current model? Electron Cloud

22. + What is the mass number of Selenium?

23. + How many protons does Silicon have?

24. + What is the charge and mass for an electron? 0 amu

25. + How many neutrons does Krypton have?

26. + What is the charge and mass for a proton? +1 1 amu

27. + How many electrons does Silicon have?

28. + NaCl is an ionic compound. What can their charges tell you about Na+ Cl- Opposite charges attract to form molecules

29. + For an atom to be neutral, which two subatomic particles need to be present in the same amount? Protons electrons

30. + Which subatomic particle is located in the energy levels of an atom? electron

31. + How many electrons can be in the first energy level of an atom? 2

32. + How many electrons can be in the second energy level of an atom? 8

33. + Use the Periodic Table to draw an atom of Beryllium

34. + Now change your Be atom into a cation. +2 charge

35. + What is the charge and mass for a neutron? 0 1 amu

36. + How many neutrons does Silicon have?