Multiple Choice
210Bi (an isotope of bismuth) has a half-life of 5.0 days.The time for three-quarters of a sample of 210Bi to decay is:
A) 2.5 days
B) 3.75 days
C) 10 days
D) 15 days
E) 20 days
Correct Answer:

Verified
Correct Answer:
Verified
Q26: Aluminum has atomic number 13, helium
Q27: Two protons are separated by 10<sup>-16</sup> m.The
Q28: A typical mammogram X-ray results in a
Q29: The relation between the disintegration constant
Q30: Starting with a sample of pure <sup>66</sup>Cu,
Q32: 1 atomic mass unit is about:<br>A)1.66 *
Q33: <sup>40</sup>K decays to <sup>40</sup>Ar with a half-life
Q34: The isotopes of an element:<br>A)cannot be separated
Q35: Which expression correctly describes the radioactive decay
Q36: A femtometer is:<br>A)larger than 10<sup>-9</sup> m<br>B)10<sup>-9</sup> m<br>C)10<sup>-12</sup>