YourFinalsAreHere
10.03.2021 •
Biology
B Bi-214
19.9 m
B
0.
Pb-210
223 a
Po - 214
44
1.64x10
Element Names
U - uranium
Th-thorium
Ra-radium
Pa - protactinium
Rn - radon
Po - polonium
Bi-bismuth
Pb-lead
Half-life units
a - years
d-days
h-hours
m-minutes
S-seconds
Bi-210
5.0 d
B
Pb-206
Stable
Po-210
138.4 d
O2
Which of the first four radioisotopes in the decay series has the longest half-life?
O Pa-234
Th-234
U-234
U-238
Solved
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Ответ:
Each parent contribute 50 percent. A person have 46 genes and 23 comes from the mother and 23 comes from the father