Assignment #16: Atomic & Nuclear Chemistry
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5
2. 3
4. 4
6. 2
23
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11
14.
16.
18.
20.
22.
24.
26.
28.
3
3
4
4
1
3
2
3
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21
2.
4.
6.
8.
10.
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1
3
4
3
2
25. Since the two nuclei have different
numbers of protons, they have different
amounts of attractions for electrons. As
a result, the amounts of energy
separating the energy levels differ for
the two elements.
26. The samples are not the same substance
because the percent of each element
differs from sample to sample.
27. Since he assumed the atom to have an
even distribution of positive charges, he
did not expect a concentration of
positive charges that would strongly
deflect or bounce back the alpha
particles.
28. The spectra are based on the elements
present in the compound. If some lines
matched and some didn’t, the
compounds have at least one element in
common and at least one differing
element.
29. Column 1: 1, 2, 1; Column 2: K, 39, 19;
Column 3: 92, 146, 92
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228
48.
50.
52.
54.
56.
4
3
4
4
2
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229
2.
4.
6.
8.
10.
12.
14.
16.
18.
20.
4
3
3
3
4
4
1
2
2
2
22.
1324
Al  0+1e- + 2412 Mg
24.
1324
Al  42He + 22286 Rn
26.
180624
Sm
28. a). unstable
b). stable
c). unstable
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232
52.
5926
Fe  0-1 e- + 5927 Co
53. 1/16
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A-26
44.
46.
48.
50.
52.
54.
56.
4
1
2
4
1
4
4