Question 4. Basics of nuclear properties and particles
( total 25 points)
(a) A nucleus of an atom of a chemical element x is denoted as hat{z}x. What are (1) the atomic number, (2) the atomic mass number, (3) the neutron number, (4) the electric charge number of the nucleus, and (5) the order number of the element in the periodic table of chemical elements?
(5 points)
(1)
(2)
(3)
(4)
(5)
(b) What would be the values of indices A_(1) and Z_(1) in the notation of a daughter nucleus hat{z}_(1)Y when the parent nucleus hat{z}x undergoes (A) alpha decay and (B) eta decay? If the parent nucleus is _(88)^(226)R, what isotope of what chemical element would appear as a result of (C) alpha decay?
(A) ,A_(1)=,z_(1)=
(B) ,A_(1)=
z_(1)=
(C)
(c) How many days should elapse for radioactivity of the iodine isotope _(53)^(131)I, which has a half-life T_((1)/(2))=8.04 days, to drop 8 times?
( 5 points)
(d) A neutron lifetime in free space is au _(n)=14.6 min. What is the relative uncertainty of neutron mass Delta (m_(n))/(m_(n)) that appears due to the Heisenberg uncertainty relation (m_(n))=(1.7*10^(-27)(kg)) ?
( 5 points)
(e) The energy Q_(f)[MeV] released in the hydrogen-deuterium fusion reaction _(1)^(1)H+_(1)^(2)H->_(2)^(3)He+gamma per one fusion The masses of nuclides are M(_(1)^(1)H)=1.007276u,M(_(1)^(2)H)=2.013553u, and M(_(2)^(3)He)=3.016029u (the energy e atomic unit is {(:Q_(1u)=931.5[Me(V)/(u)])}. How many times, approximately, Q_(f) is greater than the energy of ,en combustion Q_(c)=3eV per one molecule of H_(2) ?
( 5 points )
of 25
Total Points:
of 100
SIN ÖG̈RETIM ELEMANININ ADI-SOYADI:
IMZA:
er of the (5 poir
(1)
(4)
(5)
VY
and(Bdec result of(C) a decay
5 points)
(A)
A,
Z,
BA=
Z
(C)
(c)Howmany drop 8 times?
Iwhich
half-lifeT2 =8.04 days,to 5 points
A neutron lifetime in free space is , =14.6 min. What is the relative unccrtainty of neuts pears due to the Heisenberg uncertainty relation (m, = 1.7-10-27 kg?
m/mthat 5 points
d the energy [MeV]released in the hydrogen-deuterium fusion reactionH+HHe+ per one fusion The masses of nuclides are MH=1.007276u,MH=2.013553u,and MHe=3.016029u the energy atomic unit is =931.5 [MeV/u].How many times,approximately, is greater than the energy of en combustion =3 eV per one molecule of H? 5 points
of 25
Total Points:
of 100
SiN OGRETIM ELEMANININ ADI-SOYADI:
IMZA:
