The fallout from a nuclear explosion and the waste from a nuclear reactor contain radioactive isotopes. The atoms of these isotopes differ from stable atoms in that
A. their nuclei are unstable but they are chemically indistinguishable from stable atoms.
B. their nuclei are unstable and they are chemically unstable.
C. they are chemically unstable but their nuclei are indistinguishable from stable atoms.
D. each atom emits a steady stream of X-ray radiation.
Answer:A
The fallout from a nuclear explosion and the waste from a nuclear reactor contain radioactive isotopes. The atoms of these isotopes differ from stable atoms in that
A. their nuclei are unstable but they are chemically indistinguishable from stable atoms. B. their nuclei are unstable and they are chemically unstable. C. they are chemically unstable but their nuclei are indistinguishable from stable atoms. D. each atom emits a steady stream of X-ray radiation.