Question

Enrichment
Directions: Fill in the 12 steps in the decay of U-235 in the diagram below. Begin with U-235 and finish with an
isotope of lead. The particles emitted in each step are listed below. Use the periodic table to find information about
mass numbers, atomic numbers, and chemical symbols. Place the correct symbol in the space corresponding to the
correct mass number and atomic number.
Step
Particle emitted
235
1
Alpha
2
Beta
231
3
Alpha
227
4
Copyright Glencoe McGw-Hill, division of The Mcww.Him Companies,
Alpha
5
Beta
223
6
Alpha
Mass Number
219
7
Alpha
215
8
Alpha
9
Beta
211
10
Alpha
207
11
Beta
12
Stable
203
81 82 83 84 85 86 87 88 89 90 91 92 93
Atomic Number
1. What nucleus is the final product?

Answer 1

Answer:

See explanation and image attached

Explanation:

Decay series refers to the sequence of natural nuclear transformations that occur in the heavy radioactive elements giving rise to a series of elements with different half lives and ending up with a stable nucleus.

The uranium-235 series is pictured in the image attached to this answer as obtained from Wikipedia.  All the 12 steps in the decay are shown.

You can use this detail to fill in the table showing all the particles and isotopes involved in the process until the process finishes with an isotope of lead.