1. What is the daughter nucleus produced
when 213bi undergoes alpha decay
When
bismuth undergo an alpha decay as shown by the decay equation below,
21383bi
→ 20981tl + 42he
the daughter nucleus produced is thallium-209.
2. What is the daughter nucleus produced
when 103 mo undergoes beta decay
When
molybdenum undergo a beta decay as shown by the decay equation below
10343mo
→ 10344tc + 0-1e
the nuclide formed is technetium-103.
3. Balance this nuclear reaction by
supplying the missing nucleus. 249 cf
?
→ 24998cf + 0-1e
the above decay is a beta decay , therefore
24997bk
→ 24998cf + 0-1e
the missing nucleus is berkelium
4. Why can’t we use carbon-14 to date the
rocks?
We
can’t use carbon -14 to date rocks because rocks are not organic matters, they do not contain both the carbon-12 and
radiocarbon . Also radiocarbon dating
can only date materials that are less than 50,000 years whereas most rocks are
several millions of years old.
5. Why cant the fish fossil or dinosaur
skull be dated with either c14 or u 238
Fish
fossils can be dated using c-14 because it is an organic maerial whereas
dinosaur skull cannot be dated using c-14 because radiocarbon dating can only
give information on materials that are less than 50 ,000 years old.
Attempt the following
questions using the comment box
6. A thin sheet of aluminum can block _____.
7. Which is not a characteristic of
background radiation
8. What effect does nuclear radiation have
on atoms
9. What devices can be used to detect
nuclear radiation
10. What are the two types of nuclear bombs and
how do they work
11. How are nuclear bombs more hazardous than
normal bombs
12. If the pressure of a gas is 2.42 atm, what
is its pressure in kpa?
13. Which corresponds to a pressure of 1.23
atm?
14. What volume will a balloon occupy at 1.0
atm, if the balloon has a volume of 4.4 l at 2.2 atm?
15. A gas occupies 4.23 l at 2.25 atm. What is
the volume at 3.46 atm?
16. Calculate the temperature, in k, of 2.20
moles of gas occupying 3.30 l at 3.50 atm.
17. Moles of gas occupying 3.30 l at 3.50 atm.
18. What mass of no2 is contained in a 13.0 l
tank at 4.58 atm and 385 k?
19. What is the volume of 30.0 g of argon gas
at 157°c and 2.50 kpa pressure?
20. How many molecules of he are contained in a
10.0 l tank at 7.53 atm and 485 k?
21. What is the volume of 5.60 g of o2 at 7.78
atm and 415k?
22. How many molecules of n2 are in a 400.0 ml
container at 780 mm hg and 135°c?
23. What pressure (in atm) will 0.44 moles of
co2 exert in a 2.6 l container at 25°c?
24. How many moles of co are contained in a
5.00 l tank at 155°c and 2.80 atm?
25. Which of the following samples has the
greatest density at stp?
26. Using the symbol...what element is produced
from by the decay of radium-226
27. Gold-198 has a half-life of 2.7 days
28. The half-life of gold-198 is 2.7 days.
After 5.4 days how much of the original gold-198 remains
29. The decomposition of so2cl2 is a first
order reaction
30. Which of the following affect(s) the
half-life of a radioactive substance?
31. In the following decay equation is the
_______________
32. In a nuclear reaction which of the
following does not have to be conserved
33. Which of the following can you conclude
about a particle labeled
34. A fossil is found to have a 14c level of
64.0% compared to living organisms. How old is the fossil?
35. In a nuclear reaction, which of the
following must be conserved?
36. Swhat is missing in the following nuclear
equation?
37. Which is the daughter element in the
following decay equation?
38. Which is the daughter element in the
following decay equation 149 64 gd
39. What is missing in the following nuclear
equation 99 43 tc 99 44 ru
40. In situations involving equal masses,
reactions produce more energy than chemical reactions
41. Which of the following affect(s) the
half-life of a radioactive substance?
42. In a nuclear reaction, which of the
following does not have to be conserved?
43. In a nuclear reaction, which of the
following must be conserved?
44. In alpha and beta decay, the parent element
is always a different element from the daughter element.
45. Determining the dates of old objects by
using radioactive elements is called __________ dating.
46. What is the missing number in the nuclear
reaction shown below 237
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