Home
Class 12
CHEMISTRY
The number of alpha particles emitted pe...

The number of `alpha` particles emitted per second by 1g of `88^226` Ra is `3.7 times 10^10`. The decay constant is :

A

`1.39xx10^(-11)s^(-1)`

B

`13.9 xx10^(-11)s^(-1)`

C

`139xx10^(-11)s^(-1)`

D

`0.139xx10^(-11)s^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
`(Number of at oms d i s i ntegrati ng per se c o nd )/(Total n umber of at oms present)=K`
or `(3.7xx10^(10))/((6.02xx10^(23))/(226))=(226xx3.7xx10^(10))/(6.02xx10^(23))=K`
Promotional Banner

Topper's Solved these Questions

  • NUCLEAR CHEMISTRY

    CENGAGE CHEMISTRY ENGLISH|Exercise Ex6.4 Objective|7 Videos

  • NUCLEAR CHEMISTRY

    CENGAGE CHEMISTRY ENGLISH|Exercise Ex6.5 Objective|10 Videos

  • NUCLEAR CHEMISTRY

    CENGAGE CHEMISTRY ENGLISH|Exercise Ex6.2 Objective|8 Videos

  • NCERT BASED EXERCISE

    CENGAGE CHEMISTRY ENGLISH|Exercise Nuclear Chemistry (NCERT Exercise)|29 Videos

  • ORGANIC COMPOUNDS WITH FUNCTIONAL GROUP

    CENGAGE CHEMISTRY ENGLISH|Exercise Archives Analytical And Descriptive|24 Videos

Similar Questions

Explore conceptually related problems

Plutonium has atomic mass 210 and a decay constant equal to 5.8 xx 10^(-8)s^(-1) . The number of alpha -particles emitted per second by 1 mg plutonium is (Avogadro's constant = 6.0 xx 10^(23) ).

The kinetic energy of alpha - particles emiited in the decay of ._(88)Ra^(226) into ._(86)Rn^(222) is measured to be 4.78 MeV . What is the total disintegration energy or the 'Q' -value of this process ?

A 2 mW laser operates at a wavelength of 500 nm. The number of photons that will be emitted per second is: [Given Planck’s constant h = 6.6 xx 10^(-34)Js , speed of light c = 3.0 xx 10^(8) m//s ]

Many unstable nuclie can decay spontaneously to a nucleus of lower mass but differnet combination of nucleons. The process of spontaneous emission of radiation is called radioactivity substance. Radioactive decay is a statistical process. Radiaactivity is independent of all external conditions. The number of decays per unit time or decay rate is called activity. Activity exponentially decrease with time. Mean lifetime is always greater than half-life time. n number of alpha -particels per second are being emitted by B atoms of a radioactive element. The half-life of element will be

The number of photons emitted per second by a Medium wave transmitter of 10 kW power, emitting radio waves of wavelength 500m

The kinetic energy of alpha -particle emitted in the alpha -decay of ""_(88)Ra^(266) is [given, mass number of Ra = 222 u]

A 2 mW laser operate3s at a wavelength of 500 nm. The number of photons that will be emitted per second is : [ Given Plank's constant h=6.6xx10^(-34)Js , speed of light c=3.0xx10^(8)m//s ]

The number of photons emitted per second by a 60 W source of monochromatic light of wavelength 663 nm is: (h=6.63xx10^(-34)Js )

What are the respective number of alpha and beta -particles emitted in the following radioactive decay?

Monochromatic light of frequency 6.0xx10^(14)Hz is produced by a laser. The power emitted is 2xx10^(-3)W . The number of photons emitted, on an average, by the source per second is nxx10^(15) where n is an integer. Find the value of n?

CENGAGE CHEMISTRY ENGLISH-NUCLEAR CHEMISTRY-Ex6.3 Objective
  1. Radiactive decay is a reaction of

    Text Solution

    |

  2. Quantity of radiactive material which undergoes 10^(6) disintegrations...

    Text Solution

    |

  3. One curie of activity is equivalent to

    Text Solution

    |

  4. The unit for radioactive constant is

    Text Solution

    |

  5. The relation between half-life period (t(1//2)) and disintegration con...

    Text Solution

    |

  6. If 2g of an isotope has a half- life of 7 days, the half life of 1g s...

    Text Solution

    |

  7. Half-life of a radioactive disintegration (A rarr B) having rate const...

    Text Solution

    |

  8. Half life for radioactive C is 5760 yr. In ho many years 200 mg of ^14...

    Text Solution

    |

  9. If 3//4 quantity of a radioactive substance disintegrates in 2 hours, ...

    Text Solution

    |

  10. The initial mass of a radioactive element is 40g. How many grams of it...

    Text Solution

    |

  11. A radioisotope has a half life of 10 days. If totally there is 125 g ...

    Text Solution

    |

  12. The half- life periods of four isotopes are give below : (i) 7.6 yea...

    Text Solution

    |

  13. Radium has atomic weight 226 and half life of 1600 years. The number o...

    Text Solution

    |

  14. The decay constant of Ra^(226) is 1.37xx10^(-11)s^(-1). A sample of Ra...

    Text Solution

    |

  15. The number of alpha particles emitted per second by 1g of 88^226 Ra...

    Text Solution

    |

  16. Radioactivity of a radioactive element remains 1//10 of the original r...

    Text Solution

    |

  17. At radioactive equilibrium, the ratio between two atoms of radioactive...

    Text Solution

    |

  18. The decay constant for an alpha- decay of Th^(232) is 1.58xx10^(-10)s^...

    Text Solution

    |

  19. What percentage of decay takes place in the average life of a substan...

    Text Solution

    |

  20. The half-life of radium is 1600 yr. The fraction of a sample of radium...

    Text Solution

    |