Question

Atoms of 92U238 and 92U235 differ in structure by three ___. *
• electrons
• electrons & three protons
• neutrons
• protons
​

Answer 1

Answer:

Natural uranium contains 3 radioactive isotopes U-234 ,U-235,U-238 :

1. The weight percentage for U-235 is 0.72% and 0; 99.27% for U-238.

2. The radioactive associated with natural uranium is 2.2% with u-235 and 48,9% with u-238.

3. The half life of u-235 is 710 million years and 4500 million years for u-238.

4. U-238 has abundance 99.2745%, and u-235 has o.7200%.

5. U-238 is the first isotope in the U-238 decay series that contain 20 members and ,U-235 is the first isotope in the U-235 decay series that contain 15 members.

6. U-238 has mass number(proton 92 + neutron 146=238)

238 92U146 , U-235 has mass number (proton-92 + neutron 143 =235) 235 92U143 .