1. Check Point Quiz 4-1 4-2

2. Instructions This is to test yourself, follow instructions and you will receive full credit You can use the periodic table, but nothing else Be quite so you do not distract others Number your paper 1-30, skip spaces, you will have to go on the back Put you name and date at the top.

3. Instructions Cont. You are to write your answer next to the questions corresponding number Once all questions are answered you will trade papers Starting from the beginning we will answer each question making sure that the correct answer is given on the paper. Do not erase incorrect answers, the person needs to be able to learn from their mistake This PTT will be posted online to help with your studying, it is a tool please use it

4. Question 1-3 Protons 1.Where are they found? Nucleus 2.What is their charge? Positive 3.What is their atomic mass? 1

5. Questions 4-6 Neutrons 4.Where are they found? Nucleus 5.What is their charge? No Charge (Neutral) 6.What is their atomic mass? 1

6. Questions 7-9 Electrons 7.Where are they found? Outside nucleus in an electron cloud 8.What is their charge? Negative 9.What is their atomic mass? 1/2000

7. Question 10 10.What makes up most of the atom? Empty Space

8. Question 11 11.Why are electrons shown as a cloud in the current model of an atom? You can not tell exactly where they are at a given point of time

9. Question 12-13 12.If an element has an atomic mass of 12, and 8 protons, how many neutrons does it have? Proton + Neutron = Mass 8 + 4 = 12 So it will have 4 neutrons 13.What is this element? All elements with 8 protons are Oxygen

10. Question 14-16 14.What is the atomic number of Fe? 26 15.How many Protons does Fe have? 26 16.How many Electrons does Fe have? 26

11. Question 17-19 Sodium-22 has… 22 mean it has a mass of 22 Protons + Nuetrons = mass All sodium elements have 11 protons 11+11=22 17.How many protons? 11 18.How many electrons? 11 19.How many neutrons? 11

12. Question 20-22 20.Who developed the 1 st periodic table of elements? Dmitry Mendeleev 21.How did he organize his periodic table? By Atomic Mass 21.What three elements did he predict? Ge, Sc, Ga

13. Question 23-24 23.What did Henry Moseley do? Measure Charges of Particles 23.How did this change Mendeleev’s work? The table can now be arranged by atomic number

14. Question 25-29 Give 2 examples of each 25.Alkali Anything from the 1 st group 26.Halogens Anything from the 17 th group 27.Alkaline earth metals Anything from the 2 nd group 28.Noble gases Anything from the 18 th group

15. Question 30 30.Do you feel this exercise helped you further you understanding of the topics already covered? Why or Why not?