CHEM 1364 Test 3 Fall 1997
1. The ___________________ of light is the number of times the light 'wave' undergoes a complete oscillation per second.
2. The ___________________ Effect, in which electrons are ejected from a metal by some frequencies of light but not others, was the first bit of evidence pointing to the 'dual nature' of light.
3. _________________ can be considered to be massless 'particles' of light.
4. An electron in a(n) ________________ state is in an 'unnatural' condition, and must eventually lose energy to return to the ground state.
5. The _____________ spectra that we observed from the gas discharge tubes occurred because of the return of these electrons to a lower energy state.
6. These spectra in (6) are evidence for _________________ of energy levels - or the fact that only certain energy states are allowed.
7. Name two regions of the electromagnetic spectrum other than visible light:
_________________________ and ________________________.
8. A(n) ______________ is a three dimensional probability function for an electron.
9. The ____________________ Uncertainty Principle, which states that we cannot know both the position and momentum of an electron.
10. ___________________ electrons are the electrons in the outermost s and p subshells, plus any electrons in unfilled d or f subshells.
11. A(n) ___________________ configuration of the electrons occurs when the outer s and p subshells are completely filled, and any inner subshells are either completely filled or completely empty.
12. A species will be _________________ if there are any unpaired electrons in orbitals.
13. Species that are _________________ have identical electronic structures.
14. _________________ are those species that exhibit characteristics between those of metals and non-metals.
15. The 'family' name for the elements in Group VIIA is the _________________.
16. (15) Calculate the energy, frequency, and the wavelength (in nm) for a photon that is produced when an electron falls from the n = 6 to the n = 2 energy level in hydrogen.
17. (10) Light emitted by the fluorescence of fluorescein has an energy of 230 kJ/mol. Calculate the wavelength of this light in nm.
18. (15) Write the complete electronic structure for the following atoms and ions:
19. (15) List a correct set of values of the quantum numbers for each of the valence electrons (in the ground state configuration) for the following atoms:
20. (15) Arrange the following groups of atoms/ions in order of increasing size.
K, Cs, Li, K, Na
Ge, F, S, As, In
S2-, Ca2+, Ar, Be2+, Se2-
EXTRA CREDIT (10) Explain, from an electronic configuration standpoint, why silver is one of the few 'transition' elements that does not form a +2 charged ion.
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