Description : Is the decay of a radioactive isotope predictable (causally determined) or not?
Last Answer : At this point it seems to be a result of quantum indeterminacy. In other words, since the Heisenberg uncertainty principle is in effect at that level, all we can determine is probability (hence a predictable ... , it is deterministic and we will (hopefully) one day be able to understand it as such.
Description : (A) The archaeological studies are based on the radioactive decay of carbon-14 isotope. (R ) The ratio of C-14 to C-12 in the animals of plants is the
Last Answer : (A) The archaeological studies are based on the radioactive decay of carbon-14 isotope. (R ) The ratio of C ... D. If both (A) and (R ) are incorrect.
Description : When does an isotope undergo radioactive decay?
Last Answer : An atom of a given isotope will undergo radioactive decay whenever it feels like it. No joke. The nucleus of a radioactive isotope is unstable. Always. But that atom has no predictable moment ... to decay, except that those with very short half lives will pretty much disappear relatively quickly.
Description : What name is given to the time taken for half the atoms in a sample of a radioactive isotope to decay?
Last Answer : Half-life
Description : A radioactive isotope undergoes decay with respect to time following __________ law. (A) Logarithmic (B) Exponential (C) Linear (D) Inverse square
Last Answer : (B) Exponential
Description : The time required for half of the __________ of a radioactive isotope to decay is called its half life. (A) Nuclei (B) Electrons
Last Answer : (A) Nuclei
Description : Which of the following accounts for the maximum energy release in the nuclear fission process? (A) Kinetic energy of fission products (B) Radioactive decay of fission products (C) Instantaneous release of γ-rays (D) Kinetic energy of neutrons
Last Answer : (A) Kinetic energy of fission products
Description : When a nucleus in an atom undergoes a radioactive decay, the electronic energy levels of the atom.
Last Answer : When a nucleus in an atom undergoes a radioactive decay, the electronic energy levels of the ... decay processes D. Change for type of radioactivity.
Description : Radioactive decay of a material involves a __________ order reaction. (A) Third (B) Second (C) First (D) Zero
Last Answer : (C) First
Description : Can measurements of atomic structure made frequently enough eternally prevent decay of a radioactive atom?
Last Answer : answer:I am having a hard time imagining setting up the experiment so that the measurement happens often enough to produce the eternal isotope. It seems to me that the device doing the measurement ... from each other is fantastic. Observing one has an instantaneous affect on the other. Simply weird.
Description : How does an atom of a radioactive substance know when it is to decay?
Last Answer : We know that when we have a certain amount of radioactive material, that after a certain period, half of its atoms will have decayed. But we do not know which atom will decay at what point. No one knows. Especially not the atom.
Description : When nucleus of an electrically neutral atom undergoes a radioactive decay process, it will remain neutral after the decay if the process is (a) An `a
Last Answer : When nucleus of an electrically neutral atom undergoes a radioactive decay process, it will remain neutral ... a`gamma`-decay D. a K-capture process
Description : What type of radioactive decay releases energy from the nucleus without a change of protons neutrons?
Last Answer : This is a gamma-decay.
Description : Assertion (A) : Half life of a radioactive isotope is the time required to decrease its mass number by half Reason (R ) : Half life of radioactive iso
Last Answer : Assertion (A) : Half life of a radioactive isotope is the time required to decrease its mass number by half ... . If both (A) and (R ) are incorrect.
Description : The half life of radioactive isotope is 3 hour. If the initial mass of isotope were 256 g, the mass of it remaining undecayed after 18 hr is a)12 g b)
Last Answer : The half life of radioactive isotope is 3 hour. If the initial mass of isotope were 256 g, the mass of it remaining ... 4 g B. 8 g C. 12 g D. 16 g
Description : A sample of radioactive material has mass `m`, decay constant `lambda`, and molecular weight `M`. Avogadro constant `=N_(A)`. The initial activity of
Last Answer : A sample of radioactive material has mass `m`, decay constant `lambda`, and molecular weight `M`. Avogadro constant ... N_(4))/(M)` D. `mMe^(lambda)`
Description : A nuclide has mass number (A) and atomic number (Z). During a radioactive process if: (A) both A and Z decrease, the process is called `alpha`-decay (
Last Answer : A nuclide has mass number (A) and atomic number (Z). During a radioactive process if: (A) both A and Z decrease, ... 4 C. 1,3, and 4 D. 1,2, and 4
Description : The radioactive nuclide `._(90)^(234) Th` shows two successive `beta-` decay followed by one `alpha-` decay. The atomic number and mass number respect
Last Answer : The radioactive nuclide `._(90)^(234) Th` shows two successive `beta-` decay followed by one `alpha-` ... is: A. 92234 B. 94230 C. 90230 D. 92230
Description : The radioactive isotope of cerium - 137 of weigh 8g was collected on 1st Feb. 2006 kept in a sealed tube. On 1st July, 2006, it was found that only 0.
Last Answer : The radioactive isotope of cerium - 137 of weigh 8g was collected on 1st Feb. 2006 kept in a sealed tube. On ... days B. 30 days C. 25 days D. 50 days
Description : What daughter product is produced when thallium-206 an isotope of thallium undergoes beta minus decay?
Last Answer : This isotope is lead-206.
Description : Pick out the wrong statement. (A) The disintegration rate of a radioactive substance cannot be increased by heating it (B) Electrons have negligible mass and unit negative change (C) Deuterium atom has one proton and two neutrons in its nucleus (D) Cadmium is capable of absorbing neutrons
Last Answer : (C) Deuterium atom has one proton and two neutrons in its nucleus
Description : (3) two light nuclei combine to form a heavy nucleus Explanation: Nuclear fusion is the process of making a single heavy nucleus (part of an atom) from two lighter nuclei. The difference in mass ... . Fusion is the process that powers active or "main sequence" stars, or other high magnitude stars.
Last Answer : Helium is added to the oxygen supply of deep sea divers because it is - (1) less poisonous than nitrogen (2) (2) Lighter than nitrogen (3) Readily miscible with oxygen (4) less soluble in blood than nitrogen at high pressure
Description : Radioactive decay is a __________ change. (A) Chemical (B) Nuclear
Last Answer : (B) Nuclear
Description : Which radioactive isotope is used to detect tumours?
Last Answer : Which radioactive isotope is used to detect tumours? A. `.^(74)As` B. `.^(24)Na` C. `.^(131)I` D. `.^(60)Co`
Description : When `._(13)^(27)Al` is bombarded whith `alpha`-particles, a radioactive isotope of phosphorus `._(15)^(30)P` with the emission of …. Is formed
Last Answer : When `._(13)^(27)Al` is bombarded whith `alpha`-particles, a radioactive isotope of phosphorus ` ... A. neutrons B. protons C. positrons D. electrons
Description : A radioactive isotope having a half life of 3 days was received after 12 days. It was found that there were 3 gm of the isotopes in the container. The
Last Answer : A radioactive isotope having a half life of 3 days was received after 12 days. It was found that there were 3 gm of ... 48 g B. 36 g C. 24 g D. 12 g
Description : When an isotope is blank it is radioactive?
Last Answer : When an isotope is unstable, it is said to be radioactive.
Description : A radioactive isotope labeled cDNA probe is used in (A) Southern blotting (B) Northern blotting (C) Both (A) and (B) (D) None of these
Last Answer : Answer : C
Description : Pick out the wrong statement. (A) α-particle emission from a radioactive element makes it electrically negative (B) β-particle emission from a radioactive element makes it electrically ... ) The disintegration constant of a radioactive isotope is independent of pressure, temperature or concentration
Last Answer : (C) A radioactive element having a half life period of 20 years will completely disintegrated in 40 years
Description : Which one is the radioactive isotope of hydrogen? (A) Deuterium (B) Ortho-hydrogen (C) Tritium (D) None of these
Last Answer : (C) Tritium
Description : The radioactive isotope of hydrogen is called--------- and its nucleus contains --------proton and --- --neutron.
Last Answer : Ans: Tritium, one and two
Description : Radioactive isotope of Uranium used in Nuclear Bomb is ? A.92 U 235 (Answer) B.92 U 234 C. 92 U 233 D. 92 U 238
Last Answer : A.92 U 235 (Answer)
Description : Which technique has helped in investigation of Calvin cycle? (a) X-ray crystallography (b) X-ray technique (c) Radioactive isotope technique (d) Intermittent light
Last Answer : (c) Radioactive isotope technique
Description : A radioactive isotope has a half-life of 10 days. If today there are 125 g of it left, what was its original weight 40 days earlier (a) 600 g (b) 1000 g (c) 1250 g (d) 2000 g
Last Answer : Half life = 10days The formula which is, 1/(2)^n × original weight = Weight left today. To obtain the value of n = divide no of days by half life ie.,n= 40/10= 4 n=4 So, 1/(2)^n × original Weight = 125g 1/(2)^4 × Original weight = 125 Original weight = 16×125 = 2000g
Description : Carbon-14 dating is based on the decay of 14C to 14N. What type of radioactive decay is associated with this nuclear reaction?
Last Answer : ANSWER: b-RAY or b DECAY or ELECTRON EMISSION
Description : Physicists of ask-public: what if radioactive decay isn't constant? (see details).
Last Answer : answer:Physics is safe; they're just talking about a new wrinkle. Absent the outside influence of the solar activity, the rate of decay remains constant. The solar flares and the processes that ... miles of shielding without even slowing down, but they are know to interact with atomic nuclei.
Description : Into which of the following metals does radioactive Uranium decay when it loses all its radioactivity? -General Knowledge
Last Answer : Lead is the metal.
Description : Can the decay half-life of a radioactive material be changed? -Physics
Last Answer : Yes, the decay half-life of a radioactive material can be changed. Radioactive decay happens when an unstable atomic nucleus spontaneously changes to a lower-energy state and spits out a bit of ... radiometric dating are so accurate because decay half-lives in nature are so close to constant.
Description : For radioactive decay:
Last Answer : For radioactive decay: A. `t_(3//4) = 2 t_(1//2)` B. `t_(7//8) = 3 t_(1//2)` C. `t_(99%) = 2 t_(90%)` D. `t_(90%) = (10)/(3) t_(50%)`
Description : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process are `tau = 1// lambda` and `t_(1//2) = 0.693//lamb
Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process are `tau = 1// ... `tau = (t_(1//2))/(0.693)`
Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process ... on the amount of element not yet decayed
Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay process are `tau = 1 ... B. 53 yrs C. 530 yrs D. 5300 yrs
Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay ... exponentially C. parabolically D. all of these
Last Answer : Radioactive decay follows first-order kinetic. The mean life and half-life of nuclear decay ... lambda` depend on the nature of radioactive element
Description : Monazite sample contains 9% `ThO""_(2)` and 0.35% `U""_(3)O""_(8).Pb""^(208)` and `Pb""^(206)` are the stable and products in the radioactive decay se
Last Answer : Monazite sample contains 9% `ThO""_(2)` and 0.35% `U""_(3)O""_(8).Pb""^(208)` and `Pb ... C. It is a fertile material D. It belongs to 4n series
Description : There are four radioactive decay series called thorium `(4n)`, uranium `(4n + 2)` actinium `(4n + 3)` and neptunium `(4n + 1)` series. Neptunium serie
Last Answer : There are four radioactive decay series called thorium `(4n)`, uranium `(4n + 2)` actinium `(4n + 3)` and ... (86)^(222)Rn` D. `._(83)^(207)Bi`
Description : There are four radioactive decay series called thorium (4n), uranium (4n + 2), actinium (4n + 3) and neptunium (4n + 1) series. Neptunium series is ar
Last Answer : There are four radioactive decay series called thorium (4n), uranium (4n + 2), actinium (4n + 3) and neptunium ( ... (92)^(235)U` and `._(82)^(208)Pb`
Last Answer : There are four radioactive decay series called thorium `(4n)`, uranium `(4n + 2)` actinium `(4n + 3)` and ... (208)Pb` D. `.^(206)Pb, .^(208)Bi`
Last Answer : There are four radioactive decay series called thorium `(4n)`, uranium `(4n + 2)` actinium `(4n + 3)` and ... (90)^(212)Th` D. `._(84)^(212)Po`
Last Answer : There are four radioactive decay series called thorium `(4n)`, uranium `(4n + 2)` actinium `(4n ... A. actinium B. radium C. uranium D. polonium