Atoms!

1. Atoms!

2. Discoveries A. Theory A. Structure Isotopes Problems 10 10 10 10 10 20 20 20 20 20 30 30 30 30 30 40 40 40 40 40 50 50 50 50 50

3. Topic 1 – 10 Points QUESTION: • Who developed the chocolate chip cookie model? ANSWER: • Milikan

4. Topic 1 – 20 Points QUESTION: • Who discovered the existence of a nucleus? ANSWER: • Rutherford

5. Topic 1 – 30 Points QUESTION: • Who discovered that the neutrality of an atom means the existence of positive particles called protons? ANSWER: • Milikan

6. Topic 1 – 40 Points QUESTION: • JJ Thomson discovered that _________ are identical in all elements? ANSWER: • electrons

7. Topic 1 – 50 Points QUESTION: • Most of the positive particles shot at the gold foil in Rutherford’s experiment did what? ANSWER: • passed directly through the foil without deflecting

8. Topic 2 – 10 Points QUESTION: • Who is the founder of the modern atomic theory ANSWER: • Dalton

9. Topic 2 – 20 Points QUESTION: • Atoms cannot be created or destroyed. This is also known as the law of _____________. ANSWER: • conservation of mass

10. Topic 2 – 30 Points QUESTION: • atoms combine in simple whole # ratios to form compounds. This is also known as the law of ____________. ANSWER: • definite proportions

11. Topic 2 – 40 Points QUESTION: • Dalton stated atoms are combined, separated, or rearranged in ________________. ANSWER: • chemical reactions

12. Topic 2 – 50 Points QUESTION: • What were the two things that Dalton got wrong. ANSWER: • atoms are divisible, and elements can have different masses

13. Topic 3 – 10 Points QUESTION: • Protons and neutrons are located in the ___________. ANSWER: • nucleus

14. Topic 3 – 20 Points QUESTION: • What is the appropriate charge for an electron, proton, and neutron ANSWER: • negative, positive, neutral

15. Topic 3 – 30 Points QUESTION: • The area where electrons are located. ANSWER: • electron cloud

16. Topic 3 – 40 Points QUESTION: • Iodine has _______ protons. ANSWER: • 53

17. Topic 3 – 50 Points QUESTION: • Mg-2 has how many electrons? ANSWER: • 14

18. Topic 4 – 10 Points QUESTION: Isotopes are atoms of the same element with a different number of __________ . ANSWER: • Neutrons

19. Topic 4 – 20 Points QUESTION: An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. What is the mass number? ANSWER: • 27

20. Topic 4 – 30 Points QUESTION: Hydrogen-1 is also called _________ . ANSWER: • Protium

21. Topic 4 – 40 Points QUESTION: An isotope of Osmium (Os) has a mass number of 193. What are the two ways to write/express the isotope ? ANSWER: • Osmium – 193 • 76Os Daily Double

22. Topic 4 – 50 Points QUESTION: Sn – 118 80% Sn – 119 20% What should the mass number of tin be? ANSWER: • 118.2 amu

23. Topic 5 – 10 Points QUESTION: • What is Avogadro’s number? ANSWER: • 6.022 x 1023

24. Topic 5 – 20 Points QUESTION: • Determine the mass in grams of 4.00 mol of Oxygen. ANSWER: • 64g

25. Topic 5 – 30 Points QUESTION: • How many moles of Helium are in a 20g sample? ANSWER: • 5 mol

26. Topic 5 – 40 Points QUESTION: • Calculate the number of atoms in 10.0g of sulfur. ANSWER: • 1.88 x 1023

27. Topic 5 – 50 Points QUESTION: • A sample contains 6.5 x 1022 atoms of carbon. How much mass is in this sample? ANSWER: • 1.30 g

28. Final Jeopardy Question: Naturally occurring carbon is 80.20% carbon-13 (atomic mass = 13.01) and 19.80% of some other isotopic form of carbon. What must the atomic mass of this second isotope be in order to account for the 12.81amu average mass of carbon? Answer: 12.00 amu