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Which of the following statements are true?
1. All radioactive elements decay exponentially with time.
2. Half-life time of radioactive elements is the time required for one-half of the radioactive atoms to disintegrate.
3. Age of the earth can be determined by radioactive dating.
4. Half-life time of a radioactive element is fifty percent of its average life period.
Select the correct answer:
Nuclear wastes is waste that contains radioactive material. Radioactive material is normally a by product of nuclear power generation. Radioactive waste is regulated by government agencies in order to protect human health and the environment. Radioactivity naturally decays over time, so radioactive waste has to be isolated and confined in appropriate disposal facilities for a sufficient period until it no longer poses a threat. Which of the following statements can be inferred from the paragraph?
Which of the following statements regarding the penetrating power of radioactive decays? α-rays have low penetrating power than γ-rays Beta rays can penetrate a 5 mm aluminum sheet. Gama has the highest penetrating power.
The Taj Mahal Palace opened in Mumbai, in 1903. Alpha, Beta and Gamma three friends had a dinner at one of its famous restaurant. When the bill was received, Alpha paid 4/3 as much as Beta paid and Beta paid 1/4 as much as Gamma paid. What fraction of the bill did Beta pay?
Alpha, Beta and Gama went for a picnic at Jurassic Park, when they feel hungry they took out the stuff they brought. Alpha bought 6 sandwiches while Beta bought 4 and Gamma bought none. Both Alpha and Beta shared their sandwiches with Gamma such that each got the same amount. If Gamma paid a total amount of Rs. 10 to Alpha and Beta, how much of Rs. 10 should Alpha get ? (Assume that sandwiches and rupees can be split.)
Assertion (A) Amongst alpha, beta and gamma rays, α-particle has maximum penetrating power.
Reason (R) The alpha particle is heavier than beta and gamma rays.
Consider the following statements and Choose the correct statement/s.   A) Alpha rays are positively charged particles. B) Beta rays are negatively charged particles. C) Gamma rays are neutral particles.
Food irradiation technology uses which of the following rays or beams: X-Rays Gama Rays Electron beams Infrared rays
A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series. Gama rays, X­rays, Ultraviolet rays, ? , Infrared rays
β-rays emitted from radioactive material are known as electromagnetic radiation.