Carbon-14 is used to find the age of ancient objects.

Question

True or False

Any radioactive isotope can fission.

True or False

A nuclear reactor produces energy from uncontrolled fission.

True or False

A characteristic of a chain reaction is that the material that begins the reaction is also one of the products.

true or false?

True?

Answer 1

False.

False. (unless it's Chernobyl)

True.

Answer 2

True

false

false

false

Answer 3

True

True

False

False

Answer 4

Carbon-14 is used to find the age of ancient objects.

True - Carbon-14 dating is very common for objects up to 50,000 years old.

Any radioactive isotope can fission.

False - only certain isotopes will be unstable when they absorb a neutron and split apart.  U-235 is fissionable, U-238 is not.

A nuclear reactor produces energy from uncontrolled fission.

False - Obviously nuclear reactors are controlled.  After all, why have control rods if we don't control them.

A characteristic of a chain reaction is that the material that begins the reaction is also one of the products.

True - Tricky.  Yes, a neutron is the trigger, so to speak, and neutrons are also produced when an atom fissions.

Answer 5

C14 is used to find the age of prehistoric objects : true

Only heavy nuclei undergo fission  so any..is false

A nuclear reactor uses controlled fission so false

The 4th affirmation is also false