The half-life of a radioactive substance is 4 months. How much time will it take to decay 3/4th of the substance?

Radioactive substance emits –

The relationship between decay constant (λ) and half-life (T₁/₂) is ______.

Which one of the following is not radioactive?

Which of the following radioactive substances enters the human body through food chain and causes many physiological disorders?

The ultimate product of radioactive disintegration of uranium is –