Mass number 238 236 234 232 230 228 226 224 222 220 218 216 214 212 210 208 206 204 Part A Pó Pb Bi Po Pb Bi Po Pb Each blue anoN represents decay by Rn Η | ΑΣΦΑ R₂ Each red arrow represents decay by been Th Pa U Th 81 82 83 84 85 86 87 88 89 90 91 92 93 11 Pb Bi Po At Rn Fr Ra Ac Th Pa U Np Atomic number Nuclear decay chain for uranium-238. The decay continues until the stable nucleus 206Pb is formed. U Write the nuclear equation for the step shown for the first decay of Th Express your answer as a nuclear equation including mass numbers and atomic numbers. ? A chemical reaction does not occur for this question

How do you figure the nuclear equation for decay for 241 Am 95 as they undergo alpha emission?

Q6

1 Referring to the figure below, would you except 39 Ca to be radioactive ? Explain your answer. 20 The Band of Stability 140 130 Np ratio15T Each point on the graph represents a stable atom 120 110 100 90 Band of stability 80 70 60 np ratie- 1.2 50 Np ratisw 10 40 30 20 Hhe nip atie10 10 O 10 20 30 40 50 60 70 80 90 Number of protons Next Number of neutrons

311 Vc For the fictitious element, vaccinium, the correct information is a) atomic mass = 121, p* = 311, e = 311, n° = 189. %3D O b) p* = 121, e = 121, n° = 190 with an mass number of 311 and atomic number %3D of 121. c) is an isotope with alpha decay and a mass number of 311. Od) p* 121, e = 311, n° = 189 %3D %3D %3D