1. Atomic Theory and the Periodicity

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3. Answer: Democritus 200 Who first developed a philosophical idea about “atomos?” Back

4. 400 Answer: Hard, indivisible spheres Back What did Dalton think the atom was like?

5. 600 Answer: Gold-Foil experiment Back What experiment did Rutherford perform to discover the nucleus of the atom?

6. 800 Answer: Bohr Back Who used bright-line spectra to make his discovery about the atom?

7. 1000 Answer: see board and Schrodinger Back Draw a model of the atom that includes one “s” orbital and 2 “p” orbitals, and who developed this model?

8. 200 Answer: protons and neutrons Back What two subatomic particles are located in the nucleus?

9. 400 Answer: protons and electrons Back Which two subatomic particles must be the same in number for an atom to be neutral?

10. 600 Answer: 1 neutron Back What accounts for the difference in mass numbers if two isotopes of an element have mass numbers of 34 and 35?

11. 800 Answer: 15 protons, 15 electrons, and 17 neutrons Back How many of each subatomic particles are present in an atom of phosphorus-32?

12. 1000 Answer: 56.5 amu Back If a fictitious element (fullerium) has the following two isotopes, what is the average atomic mass of the element? 75% fullerium-56 25% fullerium-58

13. 200 Answer: The Periodic Law Back What law states that when the elements are placed in increasing atomic number order the physical and chemical properties of the elements repeat periodically?

14. 400 Answer: Left of the zig-zag line with hydrogen and metalloids as exceptions. Back Where are the metals located on the periodic table? (Be specific and list any exceptions.)

15. 600 Answer: Ionization energy or electronegativity Back Name a property of elements that increases as you go left to right across a period on the periodic table.

16. 800 Answer: a) energy required to remove an electron, and b) any element to left or below silicon Back What is ionization energy and name an element with a lower ionization energy than silicon?

17. 1000 Answer: increasing shielding and increased energy levels for valence electrons decreases electron attraction to nucleus Back Explain why electronegativity decreases as you move down a family on the periodic table.

18. 200 Answer: 5 Back How many different “d” orbitals are in any one energy level?

19. 400 Answer: oxygen Back What element does the following electron configuration represent? 1s 2 2s 2 2p 4

20. 600 Answer: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 5 Back Write the electron configuration for manganese.

21. 800 Answer: 2 and 5s Back How many valence electrons does an atom of strontium have and in which orbital are those valence electrons?

22. 1000 Answer: Back Draw the orbital diagram for promethium. 1s __ 2s __ 2p __ __ __ 3s __ 3p __ __ __ 3d __ __ __ __ __ 4s __ 4p __ __ __ 4d __ __ __ __ __ 4f __ __ __ __ __ __ __ 5s __ 5p __ __ __ 5d __ __ __ __ __ 5f __ __ __ __ __ __ __ 6s __

23. 200 Answer: proton Back Which subatomic particle identifies an element?

24. 400 Answer: many answers Back Name on Republican and one Democratic candidate running for president.

25. 600 Answer: a photon is released Back What happens when an electron moves an excited state to the ground state?

26. 800 Answer: Austin Back What is the capital of Texas?

27. 1000 Answer: Francis Scott Key Back Who wrote the lyrics to “The Star Spangled Banner?”