Post by: 2125004343 on Oct 11, 2019
Question 1
An archaeologist finds the 14C in a sample of
of material to be decaying at 107 Bq. A modern 
sample of the same material decays at 151 Bq,and assume this rate has also held in the past. The half-life of 14C is 5730 years. How old is the sample?◦ 8980 years
◦ 6230 years
◦ 8530 years
◦ 17,000 years
Question 2
The equation shows a fission reaction:
U + 
n → 
Nb + X + 4 nWhat is the missing term X in the equation?
◦
Ag◦
Sb◦
Sb◦
Sb◦
Ag
Post by: dreamfighter72 on Oct 11, 2019
Answer 1
8980 yearsAnswer 2
Sb
Post by: 2125004343 on Oct 11, 2019
Post by: dreamfighter72 on Oct 11, 2019