If you make an account of 1000 people born in the year 2000 and find that half of them are still living in 2060, does this mean that one-quarter of them will be alive in 2120 and one-eighth of them alive in 2180? What is different about the death rates of people and the “death rates” of radioactive atoms?

Q: A particular radioactive material was weighed exactly 1 year ago, showing a mass of 200 g. If the…

A: Given: Mo=200 gM=23.0 gt=1 year = 365 days

Q: What is special about neutrons that allows them to cause nuclear fission?

A: The neutrons which cause nuclear fission must be having slow speed. The slow neutrons are those…

Q: One hundred kilograms of a certain radioactive substance decay to 40 kg after 10 years. How much…

A: Given data The initial mass of the radioactive substance is: Xo = 100 kg The mass of the radioactive…

Q: hat atomic number, mass number, and element results when a Radon-222 atom emits a gamma ray through…

A: As we know that the atomic number of Radon is 86 and mass number is 222.

Q: A radioactive material requires short time to decay completely naturally.Is it true or false?

A: The phenomenon of continuous emission of radiation like alpha, beta, gamma, X-rays, etc. from a…

Q: A radioactive sample has a mass of 185 grams. How much remains after 2 half lives?

A:

Q: Although coal contains only minute quantities of radioactive materials, there is more radiation…

A: Coal power plants required more prevention of radioactive rays, instead of nuclear power plant. Most…

Q: A radioactive source consists of 6.4 x 10^11 atoms of a nuclide of a half-life of 2 days. A second…

A: According to question we need to find--- After how many days will the number of radioactive atoms…

Q: what is the difference between radioactivity and decay?

A: The difference between Radioactivity and Decay is as follows -  Radioactivity - Radioactivity means…

Q: When the author attended high school some 60 years ago, his teacher showed a piece of uranium ore…

A: Geiger counter is used to detect and measure and ionizing radiation.

Q: If two grams of a radioactive isotope has a half - life of twenty hours, the half life of one gram…

A: half life of two grams of a radioactive isotope = 20 hours

Q: If you start out with 20 grams of a radioactive material, and 4 hours later you have 5 grams of that…

A: Given data:  Initial amount of material (N0) = 20 g Time (t) = 4 hours Remaining amount of material…

Q: How does the rate of decay of a long-half-life material normally compare with the rate of decay of a…

A: Decay of a material is exponentially related to its half-life.

Q: After two half-lives of radioactivity amount of radioactive atoms remaining is none O N/2 N/4 O N/8

A: Given data: Number of half-lives (n) = 2 Required: Remaining amount after 2 half-lives

Q: are radioactivity and radioactive decay the same concepts?

A: Radioactivity is the process by which an unstable  atomic nucleus loses energy by emitting…

Q: If he sample of radioactive isotope has a half-life of one decade how much of the original sample…

A: Second decade means radioactive isotope will complete two half-life. So the amount of original…

Q: Why is nuclear fission usually followed by B-decay?

A: Nuclear fission is a reaction in which the nucleus of an atom fragmented into two or more smaller…

Q: The activity of a radioactive sample decreases exponentially as the time goes on.

A: Radioactivity of a sample is given as, Where A0 is the initial activity, lambda is the half life…

Q: How is Nuclear fission reaction different from Nuclear fusion?

A: Nuclear fission is splitting of the single nucleus into more than one nucleus.   Nuclear fusion is…

Q: Three quarters of nuclie in a given radioactive sample decays in 2 weeks. What is the half life of…

A: we have to find half life of the sample, in the given question.

Q: What happens when an unstable nucleus undergoes radioactive decay?

A: Radioactive elements are elements with unstable nuclei. To become more stable, the nuclei undergo…

Q: Suppose you have a 1 g sample of 226Ra, half-life 1600 years. How long will it be until only 0.1 g…

A:

Q: What is the long-range fate of all the uranium that exists in the world?

A: Uranium-238 is a radioactive element which decays in series of 4 steps.

Q: Suppose a person swallows some radioactive material by accident. What information is needed to be…

A: The information needed to be able to assess possible damage when a person swallows radioactive…

Q: List at least three (3) old, original names (derived from the first three letters of the Greek…

A: (1). alpha particles(α): These were later identified as the nucleus of the helium atom as these…

Q: Define and make clear distinctions between the terms neutron, nucleon, nucleus, nuclide, and…

A: Nucleus:- Its is the center of an atom which consists of protons and neutrons. It is around this,…

Q: Which describes radioactive decay of a substance?

A: Which describes radioactive decay of a substance.

Q: Radon-220 has a half-life of 55.6 seconds. What are the odds that any particular Radon-220 atom will…

A:

Q: Does food irradiation leave the food radioactive? To what extent is the food altered chemically for…

A: The process of exposing the food into a controlled amount of energy in the form of high speed…

Q: Supposed that a radioactive substance has decayed until only of 1/8 of it remains. How many…

A: let initial number of Nucleons= N0 remaining number of Nucleons= N =N08

Q: Suppose you start with 1 kilogram of a radioactivesubstance that has a half-life of 7 years. How…

A: Radioactive decay is represented by,

Q: nuclear/ radioactive decay may be best expressed as Group of answer choices N = No e-1/λλt No = N…

A:

Q: Suppose that you are given a 200 gram sample of a radioactive substance with a half-life of 45 days.…

A:

Q: If 10% of a radioactive material decays in 5 days, then the amount of the original material left…

A:

Q: what is the specific difference between radioactivity and radioactive decay?

A:

Q: The ruins of the Chernobyl reactor are enclosed in a huge concrete structure built around it after…

A: The Chernobyl nuclear reactor is a closed reactor which is situated in Ukrain. The ruins of this…

Q: The radioactive glucose used in PET scans has a half-life of approximately 2 hours. How much of the…

A: Half life (t) of radioactive glucose= 2 hours Time period (T) = 8 hours Let the original amount of…

Q: A certain radioisotope has a half-life of 8.96 days. What percentage of an initial sample of this…

A:

Q: What characteristics of radioactivity show it to be nuclear in origin and not atomic?

A: Radioactivity is a type of process in which there is an emission of the particle from unstable…

Q: The half life of radium is 1.62x10^3years. What fraction of radium would remain after 1.0x10^3years?…

A:

Q: Radioactivity depends on the nucleus and not the atom or its chemical state. Why, then, is one…

A:

Q: What is the radioactive decay process in helium?

A: Spontaneous breakdown of the atomic nucleus by releasing the energy and matter is called Radioactive…

Q: If a sample contains 20g of an isotope that has a half life of 1000 years. How much will be left…

A: Given data:  Initial amount of sample (N0) = 20 g Half life (T1/2) = 1000 years Required: Remaining…

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.