Multiple Choice
Which one of the following statements about isotopes is false?
A) The ratio of neutrons to protons is about 1:1 for elements lighter than Ca.
B) The ratio of neutrons to protons is > 1:1 for elements heavier than Ca.
C) Nonradioactive isotopes generally have an odd number of neutrons.
D) All isotopes beyond 209Bi are radioactive.
Correct Answer:

Verified
Correct Answer:
Verified
Q135: The total binding energies for <sup>3</sup>He,<sup>4</sup>He,and <sup>6</sup>He
Q136: If a sample of <sup>233</sup>Pa takes 62.7
Q137: What is the missing product of the
Q138: Human bones found on the west coast
Q139: Which of the following figures represents the
Q141: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB4940/.jpg" alt=" -What kind of
Q142: Which of the following is not an
Q143: The mass defect for the formation of
Q144: What is needed to balance the nuclear
Q145: The masses of <sup>4</sup>He,<sup>6</sup>Li,and <sup>10</sup>B are 4.0015,6.0135,and