Co 27 56.033 1059) rhodkam copper Ni Cu 20 29 63.5403 allver ruthenium 08.00 MIS palladium Pd cade Ru Rh Ag Cd 44 45 46

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Co 27 56 033 1059 Rhodkam Copper Ni Cu 20 29 63 5403 Allver Ruthenium 08 00 Mis Palladium Pd Cade Ru Rh Ag Cd 44 45 46 1 (82.32 KiB) Viewed 43 times

Co 27 56 033 1059 Rhodkam Copper Ni Cu 20 29 63 5403 Allver Ruthenium 08 00 Mis Palladium Pd Cade Ru Rh Ag Cd 44 45 46 2 (114.55 KiB) Viewed 43 times

Co 27 56.033 1059) rhodkam copper Ni Cu 20 29 63.5403 allver ruthenium 08.00 MIS palladium Pd cade Ru Rh Ag Cd 44 45 46 48 102.005 503) 106.4211) 191.07(3) osmium Iridium platinum gold mercury Os. Ir Pt Au Hg 76 77 79 80 78 190.2313) 192.217031 195.084(3) 196.966 569(4) 200.502 50. Examine the element silver (Ag). True or false: The most common isotope of silver is ¹0Ag. 108 51. How many neutrons will the most abundant isotope of zinc (Zn) have in its nucleus? Use the table above! A) 30 E) 66 B) 34 F) 67 C) 36 G) 68 D) 64 H) 70 TE 52. If you can only have whole numbers of atomic particles (protons, neutrons, and electrons), why do the atomic weights (in amu) always have decimal values? A) They don't; the atomic mass of any element will be a whole number as well. B) C) Because an electron is about 1/10 as massive as a proton, so every e-adds 0.1 amu to the atomic weight. The e are negligible, but different isotopes of the same element have different weights because of the differing neutron numbers. 191 158 187 Zn
53. What's wrong with applying the solar system model (sun+ planets) to the structure of an atom (nucleus + electrons)? A) Nothing. When Rutherford speculated that electrons should behave like tiny planets orbiting the nucleus, Bohr was able to step right in and demonstrate how Kepler's Laws of Planetary Motion applied directly to atomic structure! B) Almost everything. Any object on a closed orbit is accelerating (remember centripetal acceleration?). If that object is a charged particle, then it should be emitting an electromagnetic wave. The consequence would be electrons constantly emitting energy-which they demonstrably don't! Wavelength (m 530 $90 500 630 aption Holicos Mdin 54. Compare the emission (or bright-line) spectra for hydrogen and helium. Al Hydrogen has only one electron, so it has only one line (at 656nm). Hellum has two electrons, so it has the 5560m line and a second line at 435nm. The number of electrons matches the number of emission lines. Both spectra nave several emission lines, but they are not the same lines at the same frequencies. The spectra are identical Both H and He have four emission lines at precisely the same wavelengths Trick question Hydrogen can only form absorption lines and helium rannnaform amicinn lis (8) C DI 55. Compare the absorption (dark-line) and emission (bright- line) spectrum for mercury (Hg). A) Absorption and emission lines for any given element occur at exactly the same frequencies. B) Absorption lines occur in the infrared and ultraviolet parts of the spectrum. Emission lines are visible. Both absorption and emission lines can be visible, but they never occur at the same wavelength. C) D) There is no comparison because the lines are totally random. If you saw an unlabeled spectrum, you would have no way to know which element it came from. 56. Why does Mendeleyev generally receive the credit for developing the periodic table of the elements, even though Lothar Meyer came up with almost exactly the same table at almost exactly the same time? A) Mendeleyev gets the credit because his table was based on the prior work of Dalton. Mendeleyev used Dalton's predictions to expand the 65 known elements to the 118 we know today. B) Mendeleyev used his periodic table to predict the existence of previously undiscovered elements. For example, the element gallium was discovered after Mendeleyev's table indicated that an element should exist with its specific properties. CI Because he was a Russian, and Meyer was German. In the middle of the 1860s, Germany was known to be a haven for fakers and con men. Everybody just assumed that Mever was bluffing D) Meyer's periodic table was just plain wrong. He asserted that the symbol Pb represented the element peanut butter and Cs stood for cheese. Maybe he was just hungry and needed an Sn (Snickers). PERIODIC TABLE OF ELEMENTS Pub Cham LE Be H Symbol BCN 0 Na Ma V Cr Mn Fe Co Ni Cu Zn Ga Ge Rb fir 47 Zr Nb Mo *** p. zo. 8. en 3. S. 02TERCE 101215 Ru Rh Pd Ag Cd In Sn Sb 55-3-5-S 80