Worksheetsnuclear рк1 1-50
Total questions: 50
Worksheet time: 25mins
Name
Class
Date
1.
1Isobars are atomic nuclei having:
a)The same number of nucleons.
b)The same number of protons.
c)The same number of neutrons.
d)The same bonding energy of nucleons in the nucleus.
e)The same specific bond energy.
2.
2Photon energy:
a)E=hv
b)Е=wс
c)Е=w2с2
d)Е=m2v2/2
e)E=kz2е2/r
3.
The core radius is about:
a)10-13 cm.
b)10-5 cm.
c)1 nm.
d)10‾¹¹ cm.
e)10-10 cm.
4.
4The total energy of the nucleus:
a)
..........
b)
.........
c)
...........
d)
............
e)
........
5.
5The stability of the nucleus is determined by:
a)The value of specific bond energy.
b)Charge number.
c)Mass number.
d)The number of neutrons in the nucleus.
e)Core sizes.
6.
6Even-even cores are cores:
a)With an even number of protons and an even number of neutrons.
b)With an even number of nucleons.
c)With an even number of protons and odd neutrons.
d)With an even number of neutrons.
e)With an odd number of neutrons and an even mass number.
7.
7Core binding energy:
a)
..........
b)
............
c)
...........
d)
.............
e)
.........
8.
8The highest density of nuclear matter have:
a)The density of nuclear matter is the same for all nuclei.
b)Light cores.
c)Heavy cores.
d)Medium cores.
e) “Magic” cores.
9.
9The mass defect of the atomic nucleus is determined by the difference:
a)The mass of the nucleus and the sum of the masses of the nucleons.
b)The mass of the atom and the mass of the nucleus.
c)Masses of the nucleus and masses of protons.
d)The masses of nucleons and the mass of the atom.
e)The mass of neutrons in the nucleus and the mass of the nucleus.
10.
10Isotopes of the same element differ from each other:
a)The number of neutrons in the nucleus.
b)The number of protons in the nucleus.
c)By the number of electrons in the atom.
d)The structure of the electron shells.
e)Chemical properties.
11.
11Statistics is uniquely determined:
a)Spin.
b)Orbital quantum number.
c)Magnetic quantum number.
d)The sign of the particle wave function.
e)The energy of the particle.
12.
12The electric quadrupole moment of the nucleus characterizes:
a)The shape of the core.
b)The distribution of the electric charge in the core.
c)The value of the electric charge of the nucleus.
d)Core size.
e)Quantum-mechanical properties of the nucleus.
13.
13Isotopically invariant particles have:
a)The same "nuclear activity".
b)Identical electric charges.
c)The same back.
d)Same energies.
e)The same mass.
14.
a)Particles with nonzero rest mass.
b)Particles with zero rest mass.
c)Fermions.
d)Bosons.
e)Classic particles.
15.
15Spatial parity is determined by the expression, where - is the moment of momentum:
a)
.........
b)
..........
c)
...........
d)
............
e)
.............
16.
16Magnetic moments of nuclei with zero spin
a)Equal to zero
b)Have the order of a nuclear magneton
c)Have the order of the Bohr magneton
d)Equal 2.79
e)Constitute (-1.91)
17.
17Isotopic spin of a particle and its projection on the isotopic axis:
a)
........
b)
.........
c)
..........
d)
...........
e)
............
18.
18The spin of any nucleus in the steady state does not exceed:
a)9/2.
b)15/2.
c)7/2.
d)5.
e)13/2.
19.
19Deuteron magnetic moment:
a)
.......
b)
.........
c)
........
d)
..........
e)
...........
20.
20Level 1d5/2 due to spin-orbit interaction splits into:
a)6 states.
b)5 states.
c)7 states.
d)8 states.
e)10 states.
21.
When the p1/2 -shell of the nucleus is completely filled with nucleons, a nucleus appears:
a)
..........
b)
...........
c)
.........
d)
............
e)
.............
22.
22According to the droplet core model, the octupole quantum has the following characteristics:
a)
J=2+
b)
J=2-
c)
J=3+
d)
J=3-
e)
J=4+
23.
23Based on the formula of Weizsäcker, the probability of nuclear fission is determined by the ratio:
a)the coulomb energy of the nucleus to the energy of the surface tension.
b) the surface tension energy to the bulk energy of the nucleus.
c)the energies of the symmetry of the nuclei to the energy of the pairing of nucleons.
d)coulomb energy of the nucleus to bulk energy.
e)volumetric energy to the coulomb energy of the nucleus.
24.
24As a result of the complete filling of 1d1/2 -shell nucleons, a nucleus is formed:
a)
...........
b)
............
c)
.............
d)
..............
e)
...............
25.
25The static core model was created by:
a) Rutherford.
b)Zeeman.
c)N. Bor.
d)Wilson.
e)J. Thomson.
26.
26According to the droplet core model, each quadrupole quantum has:
a) the moment j = 2 and positive parity.
b)the moment j = 2 and negative parity.
c)the moment j = 3 and negative parity.
d)the moment j = 3 and positive parity.
e)the moment j = 4 and positive parity.
27.
27The third neutron-proton shell is completely filled with:
a)20 different nucleons.
b) 16 different nucleons.
c)17 different nucleons.
d)18 different nucleons.
e)19 different nucleons.
28.
28Between the half-life Т1/2, the constant decay l and the average lifetime t of the radioactive nucleus, there is a connection:
a)
...........
b)
............
c)
..........
d)
.............
e)
..............
29.
29 U after a-decay and two -decays is converted into an:
a)
.........
b)
..........
c)
...........
d)
............
e)
.............
30.
30What substance does Tl turn into after three consecutive b- decays and one a-decay:
a)
...........
b)
............
c)
.............
d)
..............
e)
..........
31.
31Which of the elements below does not apply to transuranium elements:
a)
........
b)
..........
c)
.........
d)
...........
e)
............
32.
32The sample contains 1000 radioactive nuclei with a Т1/2 half-life. How many atoms will decompose after 0.5 Т1/2:
a)250.
b) 100.
c)500.
d)200.
e)750.
33.
33What percentage of a radioactive sample decays over its lifetime of t:
a) 63,2%.
b)50%.
c)100%.
d)25%.
e)90%.
34.
34The half-life of 226Ra is 5,1×1010 с. What is the decay constant L:
a)1,36*10-11 s-1..
b) 0,693 s
c)6,7*10-9 s
d)1,36*1011 s.
e)5,1*10-10 s-1
35.
35The law of conservation of energy for a-decay looks like:
a)
...........
b)
..........
c)
............
d)
.........
e)
...............
36.
36The energy condition of the possibility of spontaneous a–decay:
a)
...........
b)
............
c)
.............
d)
..............
e)
..........
37.
37A common property of all b-spectra is:
a)smoothness and availability of the maximum energy em of the spectrum break.
b) discreteness.
c)continuity.
d)the presence of the maximum energy em, on which the spectrum terminates.
e)complexity and discreteness.
38.
38b--decay of the radioactive core A is described by the expression:
a)
.............
b)
............
c)
...........
d)
..........
e)
..............
39.
39Condition b- - the decay of the nucleus Mc(Z,<variant> looks like:
a)
Mc(Z,<Мc(Z-1,<variant>+me.
b)
Mc(Z,>Мc(Z+1,<variant>+me.
c)
Mc(Z,>Мc(Z-1,<variant>+2me.
d)
Mc(Z,<Мc(Z-1,<variant>.
e)
Mc(Z,<Мc(Z+1,<variant>+me.
40.
40The necessary condition for positron b+- decay of an unstable nucleus, expressed in terms of the mass of the atom Маt(Z, <variant>of the original nucleus, has the form:
a)
Маt(Z,> Маt(Z-1,<variant>.
b)
Маt(Z,>Маt(Z-1,<variant>+me.
c)
Маt(Z,>Маt(Z-1,<variant>+2me.
d)
Маt(Z,>Маt(Z+1,<variant>+me.
e)
Маt(Z,>Маt(Z+1,<variant>+2me.
41.
41For positron b+-decay of a nucleus, the instability condition is defined as:
a)
Mc(Z,<variant><Мc(Z-1,<variant>+me .
b)
Mc(Z,<variant>>Мc(Z-1,A-1)+ me.
c)
Mc(Z,<variant>>Мc(Z+1,<variant>+me .
d)
Mc(Z,<variant>>Мc(Z-1,<variant>+me .
e)
Mc(Z,<variant><Мc(Z-1,<variant>+me .
42.
42The core as a result of b+-decay turns into an isobaric nucleus in accordance with the scheme:
a)
..........
b)
...........
c)
............
d)
.............
e)
.........
43.
43When b- - decay of radioactive nuclei:
a) A does not change, Z is increased by 1.
b)And decreases by 1, Z does not change.
c)A increases by 1, Z does not change.
d)A does not change, Z decreases by 1.
e)A and Z are changed to 1.
44.
44When b+- decay of radioactive nuclei:
a)A does not change, Z decreases by 1.
b) A does not change, Z is increased by 1.
c)And decreases by 1, Z does not change.
d)A increases by 1, Z does not change.
e)A and Z are changed to 1.
45.
45The logarithm of the activity of a mixture of radioactive isotopes consisting of two components N1 and N2 with decay constants l1 and l2 is determined by the expression:
a)
..........
b)
...........
c)
............
d)
.............
e)
.........
46.
46Plasma:(мэйби)
a) Quasi-neutral system consisting of positive and negative free particles.
b)Consists of only neutral particles.
c)Consists only of Bose particles.
d)A system consisting of particles whose energy distribution is determined by the Bose-Einstein distribution function.
e)A system consisting of particles whose energy distribution is determined by the Maxwell-Boltzmann distribution function.
47.
47Plasma is a system:
a)Particles of which are subject to Coulomb interaction.
b)The interaction of particles of which is determined by quantum laws.
c)A system consisting of particles whose spins are determined by the expression nħ (n is an integer).
d)Particles whose energy distribution obeys the Bose-Einstein law.
e)Particles whose energy distribution is described by the Fermi-Dirac function.
48.
48For plasma electrons, the following statement is true:
a)The probability of electron scattering on ions is determined by the effective cross section.
b) Their interaction is determined by quantum laws.
c)The electron energy obeys the Bose-Einstein law.
d)Electron mobility is determined by spin moments.
e)The average electron temperature is determined by the magnitude of the total spin moment.
49.
49A force acting on a charged particle moving in a uniform magnetic field:
a)Lorentz.
b)Archimedes.
c)Inertia.
d)Electromotive.
e)Magnetmode.
50.
50In plasma:(мэйби)
a)Electric current occurs under the action of an electric field.
b) The interaction of electrons and ions is determined by their quantum properties.
c)The energy distribution of electrons obeys the Bose-Einstein law.
d)Electron mobility is determined by spin moments.
e)The average electron temperature is determined by the magnitude of the total angular momentum.
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