Assignment

1. Write a course reflection of at least 350 words that includes the following:

• Summarize what you believe to be the most important concepts you learned in this class.
• Explain how you can apply the concepts learned from this class to other aspects of your life. Give at least two examples.

Format your reflection consistent with APA guidelines.

2. Write the following isotopes in nuclide notation (e.g., "¹⁴C₆

a. Oxygen-14
b. Copper-70
c. Tantalum-175
d. Francium-217

3. Which of the following nuclei lie within the band of stability shown below?

(a) argon-40
(b) oxygen-16
(c) 122Ba
(d) 58Ni
(e) 205Tl
(f) 210Tl
(g) 226Ra
(h) magnesium-24

Nuclear Equations

a. ⁷₃Li + ? → 2⁴₂He
b. ¹⁴₆C → ¹⁴₇N + ?
c. ²⁷₁₃Al + ⁴₂He → ? + 4¹₀n

4. For the reaction 14 C → 14 N + ?, if 100.0 g of carbon reacts, what volume of nitrogen gas (N₂) is produced 67 at 273K and 1 atm?

5. Radioactive Decay

What changes occur to the atomic number and mass of a nucleus during each of the following decay scenarios?

a. an α particle is emitted
b. β particle is emitted
c. γ radiation is emitted
d a positron is emitted
e. an electron is captured

6. A 1.00 × 10^-6-g sample of nobelium, 254 /102No, has a half-life of 55 seconds after it is formed. What is the 102percentage of 254/102 No remaining at the following times?
a) 5.0 min after it forms
b) 1.0 h after it forms

7. A 7/4 Be atom mass = 7.0169 amu) decays into a 7/3 Li atom mass = 7.0160 amu) by electron capture. How much energy in millions of electron volts, MeV) is produced by this reaction?

8.Write a balanced equation for each of the following nuclear reactions:

(a) mercury-180 decays into platinum-176
(b) zirconium-90 and an electron are produced by the decay of an unstable nucleus
(c) thorium-232 decays and produces an alpha particle and a radium-228 nucleus, which decays into actinium-228 by beta decay
(d) neon-19 decays into fluorine-19.