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.
Answer:C
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.