Success Is Not Final, Failure Is Not Fatal: It Is the Courage to Continue That Counts

“Success is not final, failure is not fatal: it is the courage to continue that counts.” ~Winston Churchill Name: ______Date: ______7.2 Nuclear Stability and Decay AHS Instructor Ms. Kasia Room 109 UNIT 7: Nuclear Chemistry 7.2 Independent Practice (20 pts)

1. Which radioisotope undergoes beta decay and has a half-life of less than 1 minute? 7. What is the mass number of an alpha particle? (1) Fr-220 (1) 1 (2) K-42 (2) 2 (3) N-16 (3) 0 (4) P-32 (4) 4

2. What is the half-life and decay mode of Rn- 8. Which list of nuclear emissions is arranged in 222? order from the least penetrating power to the (1) 1.91 days and alpha decay greatest penetrating power? (2) 1.91 days and beta decay (1) alpha particle, beta particle, gamma ray (3) 3.82 days and alpha decay (2) alpha particle, gamma ray, beta particle (4) 3.82 days and beta decay (3) gamma ray, beta particle, alpha particle (4) beta particle, alpha particle, gamma ray 3. According to Reference Table N, which pair of isotopes spontaneously decays? 9. Which type of radioactive emission has a (1) C-12 and N-14 positive charge and weak penetrating power? (2) C-12 and N-16 (1) alpha particle (3) C-14 and N-14 (2) beta particle (4) C-14 and N-16 (3) gamma ray (4) neutron 4. What is the decay mode of 37K? 10. Which statement best describes gamma radiation? (1) It has a mass of 1 and a charge of 1. (2) It has a mass of 0 and a charge of -1. 5. Which two radioisotopes have the same decay (3) It has a mass of 0 and a charge of 0. mode? (4) It has a mass of 4 and a charge of +2. (1) 37Ca and 53Fe (2) 220Fr and 60Co 11. Which nuclear decay emission consists of (3) 37K and 42K energy, only? (4) 99Tc and 19Ne (1) alpha particle (2) beta particle 6. Which nuclear emission has the greatest (3) gamma radiation penetrating power? (4) positron (1) alpha particle (2) beta particle 12. Alpha particles are emitted during the (3) gamma radiation radioactive decay of (4) positron (1) carbon-14 (2) neon-19 (3) calcium-37 (4) radon-222 “Success is not final, failure is not fatal: it is the courage to continue that counts.” ~Winston Churchill

1. Which nuclear emission has the greatest mass?

2. What is penetrating power and what is it dependent on?

3. What is the decay mode of radium-226?

4. Write the beta decay of Pb-210.

5. List the types of radiation in order of increasing mass.

6. List the types of radiation in order of increasing penetrating power.

7. The nucleus of a radium-226 atom is unstable, which causes the nucleus to spontaneously (1) absorb electrons (3) absorb protons (2) decay (4) oxidize

8. Write the positron emission of Ca-37 “Success is not final, failure is not fatal: it is the courage to continue that counts.” ~Winston Churchill