Question

Which statement explains why nuclear waste materials may pose aproblem?(1) They frequently have short half-lives and remain radioactive for brief periods of time.(2) They frequently have short half-lives and remain radioactive for extended periods of time.(3) They frequently have long half-lives and remain radioactive for brief periods of time.(4) They frequently have long half-lives and remain radioactive for extended periods of time.

Answer 1

     Because they frequently have a long half-lives, therefore his stay in the middle is long.

Number 4

If you notice any mistake in my english, please let me know, because i am not native.

Answer 2

Answer: The correct answer is option (4)

Explanation:

Nuclear waste is a waste material left after the use of nuclear material in a nuclear reactor. The waste material left behind is higher in radio-activity that is the waste is radio-active in nature. This waste is highly toxic in nature.

Being possessed by radio-active nuclear substance they have long half-lives which allows them to be remain radioactive for extended periods of time.

Their ability to be remain radioactive for extended periods of time poses a great problem for the experts.