23 U decays by a emission. What is the \"daughter\"? A. 214 Bi B. 235U C. 235U D

Question

23 U decays by a emission. What is the "daughter"? A. 214 Bi B. 235U C. 235U D. 234Th E. 235Ac e.g. 135X 230 231 232 233 234 235 236 237 238 Hide Chart Lock info 223pa 224 pa 225Pa 226Pa 227Pa 228pa 229pa 230 Pa 231Pa 232Pa 233Pa 234Pa 235Pa 236P 237Pa Th 224Th 225Th 226Th 227. 228Th 229Th 230Th 231 Th 233 Th 234. 35Th 236Th 232 Th Th 216 217 218 219 220 221A 223 224 225 226 227 A 22 Ac Ac 215Ra 216Ra 217Ra 218Ra 219Ra 220Ra 221Ra Ra 223Ra 224Ra 225Ra 226Ra 227 228Ra 229Ra 230Ra 214 Fr 215Fr. 216Fr 217Fr 218Fr 219 Fr 220 Fr 221Fr 222 Fr 223Fr 224Fr 225Fr 226Fr 214Rn 215Rn 216Rn 217Rn 218Rn 219Rn 220Rn 221Rn 222Rn 223Rn 224Rn 225Rn 226Rn 228Rn 29Rn z: 86 n: 142 At t 213At 214At 215At 21 225 At At 228 At 229 226 227 17Po 218Po 219Po 220P 4Po 225Po 226Po 227P 222Po 223Po 10Bi 211Bi 212Bi 213Bi 214Bi 215Bi 216Bi 217Ri a8Bi 219Bi 220Bi 221Bi 20 B 210 Pb 11 212 Pb 213Pb 214 215pb 216pb 217Pb 218Pb 219Pb 220 20 Pb Pb 208TI 209TI 210TI 211TI 212TI 213TI 214TI 215TI 216TI 217TI

Explanation / Answer

To understand this, we need to undesyand the concepts of Alpha and Beta decay.

Alpha Decay: In alpha decay, the atom splits to produce an Helium atom and the daughter atom. Since the paret atom lost an Helium atom, the mass of it gets reduced by 4 (2 protons + 2 neutrons). And the atomtic number gets reduced by 2 because of the loss of two protons.

In the very first image, U238 undergoes alpha decay which means that the resultant daughter atom will be lighter by 4 units. hence the 238-4 = 234 mol wt.

The vertical Axis "Z" means the mass number in this case, while the horizontal axis "N" is the the number of Neutrons.

So the daughter produced will have mol wt of 234 which is option D. Th234.

In the second image, a beta decay is taking place. In Beta negative decay, a neutron splits into a proton and an electron is released. In this process, the mass number remains the same but the no. of neutrons reduces by one.

Hence for the second image, the mass 234 remians same but the N value reduced by 1.

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