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 : Which is ture about decay constant `(lambda)`?
Last Answer : Which is ture about decay constant `(lambda)`? A. Unit is `"time"^(-1)` B. value of `lambda` ... time to the total no. of atoms present at the time.
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 : 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 : If`N_(1),N_(2),N_(3),……`are the number of molcules with molecular masses `M_(1),M_(2),M_(3),…`respectively ,then mass average molar mass is expressed
Last Answer : If`N_(1),N_(2),N_(3), `are the number of molcules with molecular masses `M_(1),M_(2),M_(3), ` ... SigmaN_(i)` D. `(SigmaN_(i)M_(i))/(SigmaM_(i)`
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 : 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 : What type of decay involves only the release of high-energy photons and therefore does not change the mass of an atom of a radioactive isotope?
Last Answer : High-energy photons are gamma rays; the decay is called gamma decay. Please note that the mass of an atom DOES change, since a loss of energy is accompanied by a loss in mass.
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 : In β-decay of radioactive material, the ratio of neutron to proton (A) Increases (B) Remain same (C) Decreases (D) Is unpredictable; may increase or decrease
Last Answer : (C) Decreases
Description : Radioactive decay of a material involves a __________ order reaction. (A) Third (B) Second (C) First (D) Zero
Last Answer : (C) First
Description : The decay constant for an `alpha-` decay of `Th^(232)` is `1.58xx10^(-10)s^(-1)`. How many `alpha-`decays occur from `1 g` sample in 365 days ?
Last Answer : The decay constant for an `alpha-` decay of `Th^(232)` is `1.58xx10^(-10)s^(-1)`. How many `alpha-` ... )` C. `2.219 xx 10^(19)` D. None of these
Description : Radioactive substance has a constant activity of 2000 disintegrations per minute. The material is separated into two fractions, one of which has an in
Last Answer : Radioactive substance has a constant activity of 2000 disintegrations per minute. The material is separated into two ... 1500 B. 1000 C. 1250 D. 2000
Description : Monochromatic radiation of wavelength `lambda` is incident on a hydrogen sample in ground state. hydrogen atoms absorb a fraction of light and subsequ
Last Answer : Monochromatic radiation of wavelength `lambda` is incident on a hydrogen sample in ground state. ... different wavelength .Find the value of `lambda`
Description : The new nucleus formed after β-decay of a radioactive element has (A) Less atomic number (B) Less atomic weight (C) More atomic number (D) More atomic weight
Last Answer : (A) Less atomic number
Description : A radioactive element gets spilled over the floor of a room. Its half life period is 30 days. If its initial activity is ten times the permissible val
Last Answer : A radioactive element gets spilled over the floor of a room. Its half life period is 30 days. If its initial ... B. 1000 days C. 300 days D. 10 days
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 : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts nitrous acid then occurs a brisk evolution of `N_(2)` gas. A dissolve
Last Answer : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts ... . 1-phenylethanamine C. 1-cyclohexylethanamine D. N-ethylaniline
Description : Which of the following is the best example of law of conservation of mass? [NCERT 1975] (A) 12 g of carbon combines with 32 g of oxygen to form 44 g of CO2. (B) When 12 g of carbon is ... mass remains unaltered. (D) The weight of a piece of platinum is the same before and after heating in air.
Last Answer : (A) 12 g of carbon combines with 32 g of oxygen to form 44 g of CO2.
Description : The mass of one Avogadro number of helium atom is (a) 1.00 g (b) 4.00 g (c) 8.00 g (d) 6.02 × 1023 g
Last Answer : Ans:(b)
Description : The mass of one Avogadro number of helium atom is?
Last Answer : 4.00 gram
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 : 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 : 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 : 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 : 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
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 : (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 : Consider the following decay series: `A to B to C to D` Where, A,B and C are radioactive elements with half lives of 4,5 sec, 15 days and 1 sec respec
Last Answer : Consider the following decay series: `A to B to C to D` Where, A,B and C are radioactive elements with half ... mol of C, 1/4 mol of D and noen of A
Description : A radioactive nucleus can decay by two different processes. The mean value period for the process is `Z_(1)` and that for the second process is `Z_(2)
Last Answer : A radioactive nucleus can decay by two different processes. The mean value period for the process is `Z_(1)` and that ... (1)Z_(2))/(Z_(1) + Z_(2))`
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 : What is the primarily released in radioactive decay?
Last Answer : Need answer
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 type of radioactive decay releases energy from the nucleus without a change of protons neutrons?
Last Answer : This is a gamma-decay.
Description : What is the Radioactive decay of carbon 14?
Last Answer : When living things (animals & plants) are alive they havethe radioactive chemical carbon 14 in their bodies. Radioactivematerials emit radiation. When it dies the carbon 14 ceases to berenewed and ... amount of radiation being emitted by something long deadscientists can tell how long ago it died.
Description : The least energetic of the forms of radioactive decay is ______?
Last Answer : alpha decay
Description : The process of changing of one element into another is called (a) radioactive decay (b) transmutation of the elements (c) covalent bond formation (d) hybridization
Description : Radioactive decay is a __________ change. (A) Chemical (B) Nuclear
Last Answer : (B) Nuclear
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 : The phenomenon of nuclear fission is opposite to that of (A) Radioactive decay (B) Thermionic emission (C) Nuclear fusion (D) Combustion
Last Answer : (C) Nuclear fusion