A radioactive material has mean lives of 162Q year and 520 year for a and Bemission respectively. Material decays by simultaneous a and Bemission. Time in which 1/4th of material remains intact is (1) 546 year 648 year 33. (2) 720 year (4) 324 year (3)
A radioactive material has mean lives of 162Q year and 520 year for a and Bemission respectively. Material decays by simultaneous a and Bemission. Time in which 1/4th of material remains intact is (1) 546 year 648 year 33. (2) 720 year (4) 324 year (3)
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter7: The Structure Of Atoms And Periodic Trends
Section: Chapter Questions
Problem 83SCQ: Slaters rules are a way to estimate the effective nuclear charge experienced by an electron. In this...
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Question
Ques No 33
Transcribed Image Text:is [m 1.67 x 10 27 kal
stant and A is the mass number
by the expression R RA where Ris con
de of density of uranim nucles
Which of the following statements is not corren
(1) the radius of a nucleus is approximately given
the energy equivalent of mass of a neutron is
3) the density of nuclear matter is about
attractive gravitational force between two
(2) the ratio of repulsive coulomb force to the
(3) Isotopes of carbon (4) Isotopes of nitrogen
x10(1) 1020 kg/m
421 107 kg/m
(3) 1014 kg/m
n to
(4)
10 kg/m
30.
en
Vrays hynt
jups
protons is 1.24 x 1036
2.3 x 1015 kg/m3
(4)
larger than that of a proton
The nuclei C13 and ,N can be described as
(1) Isobars
14
31.
12 isotones
Force between protons in nucleus will be
(1) only nuclear
(2) only coulomb
3) nuclear, coulomb and gravitational
(4) coulomb & gravitational
A radioactive material has mean lives of 1620 year
and 520 year for a and Bemission respectively.
Material decays by simultaneous a and Bemission.
Time in which 1/4th of material remains intact is
(1) 546 year
(3) 648 year
32.
33.
(2) 720 year
(4) 324 year
A sample contains 16 g of a radioactive material,
half life of which is 2 days. After 32 days amount
of radioactive material left in the sample is
(1) less than 1 mg
(3) 1/2 g
34.
(2) 1/4 g
(4) 1 g
2-
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