7. A portion of the radioactive decay series that starts with Th-232 is as follows. For each step, write the product. Th-232 (goes through a decay) → ? (goes through ß decay) → ? (goes through B decay)? (goes through a decay) → ? (goes through a decay) → ? (goes through a decay) → ? 8. Two common units for measuring radioactivity are the Becquerel and the curie. Why are these names appropriate? 9. When 4.00 g of hydrogen nuclei fuse to form helium in the sun, 0.0265 g of matter is converted into energy. Using the mass converted to energy and the speed of light 3.00x 108 m/s and that a joule = kg m²/s², calculate how much energy is given off. =

The table below lists information about the radioactive decay of three nuclides. Fill in the missing information.

Identification and Characterization of Unstable and Stable Nuclei Nuclear stability can in general be predicted based on the following considerations: • Nuclei with 84 protons or more are unstable. • Nuclei containing a magic number of protons and/or neutrons tend to be stable. • Stable nuclei often contain even numbers of protons and/or neutrons. These factors are reflected in the given graph (Figure 1). which shows the valley of stability as a function of number of neutrons and protons. Figure Number of neutrons 110 100 90 80 70 60 50 40 30 20 10 0 0 www Belt of stability 10 1:1 neutron-to- proton ratio 20 30 40 50 60 70 80 Number of protons 1 of 1 "Magic" numbers A magic number is the name given to certain numbers of protons or neutrons that have a high correlation to stability in nuclei: magic numbers of protons: 2, 8, 20, 28, 50, 82 magic numbers of neutrons: 2, 8, 20, 28, 50, 82, 126, 184 ▼ A plot of the number of neutrons versus the number of protons for all known stable nuclei,…

Balance this nuclear reaction by supplying the missing nucleus. Replace each question mark with an appropriate integer or symbol. 249 Cf+ 257 98 104 Rf + 4n 40°F A @ 8:36 PM 12/12/2021 ..

The uranium decay series from U-238 to stable lead (Pb-206) is: 238U → 234 Th → 234Pa → 234U → 230 Th → 210Pb → 210Bi → 210PO → 206 Pb Th - Pb → Bi → Po → 226 Ra → 222Rn → 92 90 91 92 88 86 84 83 84 Of the 15 nuclei from U-238 to Pb-206, list those radionuclides that are alpha-particle emitters, and those that are beta-particle emitters. State your reasons.