Name(s):________________________________ CHM 1020 W10 Week 10 Assignment Part A: A. Watch Nuclear Science and Radioactivity and answer questions pertaining to it:...

Name(s):________________________________    CHM 1020 W10
Week 10 Assignment
Part A:
A. Watch Nuclear Science and Radioactivity and answer questions pertaining to it: https:
www.youtube.com/watch?v=zmwIQK1DqQk
1. In this demonstration, what instrument was used to measure radioactivity?
2. What element was used to make the numbers of the watch glow in the dark?
3. A) Two forms of radiation are produced by this element. What are they?
B) Which form of radiation was detected by the instrument?
B. Watch the Concepts of Isotopes and answer questions pertaining to it:
https:
www.youtube.com/watch?v=oLnuXpf4hsA
1. What subatomic particles affect the mass of an atom?
a. Protons
. Neutrons
c. Electrons
d. Protons and Neutrons
e. Neutrons and Electrons
2. Which isotope of Hydrogen was the heaviest? Why, what causes it to be heavier than the others?
C. Watch the Radiation of Objects and answer questions pertaining to it:
https:
www.youtube.com/watch?v=pmo_w-dQ4JE
1. What was the element that was measured in the fertilizer?
2. What was the element that was measured in the camping lantern?
3. A) What was the element that was measured in the smoke detector?
B) What kinds of radiation does this element emit?
C) What happened when the paper was placed between the instrument and the smoke detector? How is this result used in smoke detectors in homes?
Part B:
Multiple Choice
    1. Which particle has a negative charge?
    A. Alpha particle
    B. Positron
    C. Neutron
    D. Beta particle
    2. Which particle has the same mass as an electron, but a positive electric charge?
    A. Alpha particle
    B. Gamma photon
    C. Proton
    D. Positron
3. Which of the following gives the co
ect order for energies of portions of the electromagnetic spectrum?
    A. radio > visible light > gamma > ultraviolet > infrared
    B. visible light > ultraviolet > infrared > radio > gamma
    C. radio > infrared >ultraviolet > gamma > visible light
    D. gamma > ultraviolet > visible light > infrared > radio
    4. Which of the following affects the half-life of a radioactive sample?
    A. The age of sample
    B. The size of the sample
    C. The temperature of the sample
    D. None of these
    5. Which radioactive element, if ingested, is primarily incorporated into bone tissue?
    A. Uranium
    B. Radon
    C. Radium
    D. Thorium
    6. The process that generates energy in the sun and stars is
    A. Fusion            
    B. Fission
    C. ß-emission            
    D. Positron emission
7. The process where an atomic nucleus is split into two smaller nuclei and a large amount of energy is produced is called
    A. Fusion            
    B. Fission
    C. ß-emission            
    D. Positron emission
8. An Isotope is defined as an atom of the same element that has a different number of _______?
    A. Protons
    B. Neutrons
    C. Electrons
    D. Protons and Neutrons
9. Which of the following is not a unit used to measure radioactivity?
    A. Geige
    B. Curie
    C. Becquerel
    D. All of the above are units used to measure radioactivity.
MATH PROBLEMS and SHORT ANSWER QUESTIONS – Show your Work:
10. For the Isotope 6731Ga
A. What is the atomic number?
B. What is the mass number?
C. What is the number of protons?
D. What is the number of neutrons?
11. For the Isotope 8538S
    A. What is the atomic number?
    B. What is the mass number?
    C. What is the number of protons?
    D. What is the number of neutrons?
12. Give two examples of common radioisotopes used in medicine. Be sure to write the full name of the isotope (As an example from the previous question 8538Sr can be written as Sr – 85) and state what the isotope is used for.
    A. ____________________ Isotope is used for ____________________
    B. ____________________ Isotope is used for ____________________

13. Curium – 245 is an alpha emitter. Write the equation for the nuclear reaction and identify the product nucleus.
14. In the equation 22890Th → 22891Pa + X which particle is represented by X?
    
15. Americium – 242 is a beta emitter. Write an equation for this nuclear reaction and identify the product nucleus.
16. Bismuth – 210 is an alpha emitter. Write an equation for this nuclear reaction and identify the product nucleus.
17. Phosphorus – 29 is a positron emitter. Write an equation for this nuclear reaction and identify the product nucleus.
18. Samarium – 151 is a beta emitter. Write an equation for this nuclear reaction and identify the product nucleus.
19. How much of a 24-gram sample of Radium-226 will remain unchanged at the end of three half-life periods?
    
20. Iodine – 125 emits gamma rays when it decays to Tellerium-125 and has a half-life of 60 days. If a 0.020 g pellet of iodine – 125 is implanted into a prostate gland, how much iodine – 125 remains there after one year?
21. Barium – 122 has a half-life of 2 minutes. Suppose you obtain a sample weighing 10.0 g and it takes 10 minutes to set up an experiment. How many grams of Barium – 122 will remain at the point when you begin the experiment?
22. A normal adult jawbone contains 200 mg of Ca
on-14 in a living person. If scientists found a jawbone that only had 50mg of Ca
on-14, how old is the bone? (The half-life of C-14 is 5730 years).