1. Nng lng ngh ca 1 gam nguyn t Cban A. 9.1016J B. 3.108J

60 27

Co bng: D. 3.105J

C. 9.1013J

2. Ht nhn ZA X c khi lng l mX. Khi lng ca prtn v ca ntron ln lt l mp v mn. ht khi ca ht nhn ZA X l: A. m=[Zmn+(A-Z)mp]-mX C. m=[Zmp+(A-Z)mn]-mX B. m=mX - (mn+mp) D. m= (mn+mp) - mX

3. Khi lng ca ht nhn 10 Be l 10,0113(u), khi lng ca ntron l mn=1,0086u, khi lng 4 ca prtn l mp=1,0072u. ht khi ca ht nhn 10 Be l: 4 A. 0,9110(u) B. 0,0811(u) C. 0,0691(u) D. 0,0561(u)

4. Khi lng ca ht nhn 10 Be l 10,0113(u), khi lng ca ntron l mn=1,0086u, khi lng 4 ca prtn l mp=1,0072u v 1u=931MeV/c2. Nng lng lin kt ca ht nhn 10 Be l: 4 A. 64,332 (MeV) B. 6,4332 (MeV) C. 0,064332 (MeV) D. 6,4332 (KeV) 5. Cho nng lng lin kt ca ht nhn l 36,4 MeV. Nng lng lin kt ring ca ht nhn bng A. 18,2 MeV/nuclon C. 9,1 MeV/nuclon B. 6,067 MeV/nuclon D. 36,4 MeV/nuclon

6. Bit khi lng ca prtn mp=1,0073u, khi lng ntron mn=1,0087u, khi lng ca ht nhn teri mD=2,0136u v 1u=931MeV/c2. Nng lng lin kt ring ca ht nhn nguyn t teri 2 1 D l A. 1,12MeV B. 2,24MeV C. 3,36MeV D. 1,24MeV 7. Cho 1u=931MeV/c2. Ht c nng lng lin kt ring 7,1MeV. ht khi ca cc nuclon khi lin kt thnh ht l : A. 0,0256u B. 0,0305u C. 0,0368u D. 0,0415u 8. Tm pht biu sai v nng lng lin kt. A. Nng lng lin kt tnh cho mt nucln gi l nng lng lin kt ring. B. Mun ph v ht nhn c khi lng m thnh cc nucln c tng khi lng m0>m th cn nng lng E=(m0-m)c2 thng lc ht nhn. C. Ht nhn c nng lng lin kt ring cng nh th cng km bn vng. D. Ht nhn c nng lng lin kt E cng ln th cng bn vng.56 2 2 9. Nng lng lin kt ca cc ht nhn 1 H ; 2 He ; 26 Fe v 492 MeV; v 1786 MeV. Ht nhn bn vng nht l: 2 A. 1 H 2 B. 2 He 235 92

U ln lt l 2,22MeV; 28,3 MeV; D.235 92

C. 26 Fe

56

U

12 10. Cho bit mC=12,0000u; m=4,0015u. Nng lng ti thiu cn thit chia ht nhn 6 C thnh ba ht l:

A. 6,7.10-13J

B. 7,7.10-13J

C. 8,2.10-13J

D. 5,6.10-13J

12 11. Ht nhn 6 C b phn r thnh 3 ht di tc dng ca tia . Bc sng ngn nht ca tia phn ng xy ra: 0 0 0 0 A. 301.10-5 A B. 189.10-5 A C. 258.10-5 A D. 296.10-5 A

14 12. Bn ph ht nhn 7 N ng yn bng mt ht thu c ht proton v mt ht nhn Oxy. Cho khi lng ca cc ht nhn mN=13,9992u; m=4,0015u; mp=1,0073u; mO=16,9947u; 1u=931MeV/c2. Khng nh no sau y lin quan n phn ng ht nhn trn l ng?

A. Thu 1,39.10-6 MeV C. Thu 1,21 MeV

B. Ta 1,21MeV D. Ta 1,39.10-6 MeV

13. Cho phn ng ht nhn: T+D+n. Cho bit mT=3,016u; mD=2,0136u; m=4,0015u; mn=1,0087u;1u=931MeV/c2. Khng nh no sau y lin quan n phn ng ht nhn trn l ng ? A. ta 18,06MeV B. thu 18,06MeV C. ta 11,02 MeV D. thu 11,02 MeV6 1 3 4 14. 3 Li + 0 n 1T + 2 + 4,8MeV . Cho bit: mn=1,0087u; mT=3,016u; m=4,0015u; 1u=931MeV/c2. Khi lng ca ht nhn Li c gi tr bng:

A. 6,1139u

B. 6,0839u

C. 6,411u27 13

D. 6,0139u30 Al + 15 P + n

15. Xt phn ng ht nhn xy ra khi bn ph nhm bng cc ht :

Bit cc khi lng: mAl =26,974u; mP=29,97u; m=4,0015u; mn=1,0087u; 1u=931,5MeV/c2. Tnh nng lng ti thiu ca ht phn ng xy ra. B qua ng nng ca cc ht sinh ra. A. 5MeV B. 4MeV C. 3MeV D. 2MeV

6 1 3 4 16. Cho phn ng ht nhn: 3 Li + 0 n 1T + 2 + 4,8MeV . Nng lng ta ra khi phn tch hon ton 1g Li l:

A. 0,803.1023MeV

B. 4,8.1023MeV

C. 28,89.1023MeV

D. 4,818.1023MeV

1 9 4 17. Cho phn ng ht nhn sau: 1 H + 4 Be2 He + X + 2,1MeV . Nng lng ta ra t phn ng trn khi tng hp c 4 gam heli bng

A. 5,61.1024MeV

B. 1,26.1024MeV

C. 5,06.1024MeV

D. 5,61.1023MeV

235 144 89 18. Cho phn ng phn hch Uran 235: n + 92 U 56 Ba + 36 Kr + 3n + 200 MeV . Bit 1u=931MeV/c2.

ht khi ca phn ng bng: A. 0,3148u B. 0,2148u C. 0,2848u D. 0,2248u2 4 19. Cho phn ng ht nhn sau: 1 D + 3T 2 He + n 1 2 Bit ht khi khi to thnh cc ht nhn 1 D,3T ,24He ln lt l: mD=0,0024u; mT=0,0087u; 1 2 mHe=0,0305u. Cho 1u=931MeV/c . Nng lng to ra ca phn ng l:

A. 1,806 MeV

B. 18,06 MeV

C. 180,6 MeV

D. 18,06 eV

2 2 4 20. Cho phn ng ht nhn sau: 1 H +1H 2 He + n + 3,25MeV 2 Bit ht khi ca 1 H l mD=0,0024u;v 1u=931MeV/c2. Nng lng lin kt ca ht nhn 4 2 He l:

A. 7,7188 MeV

B. 77,188 MeV

C. 771,88 MeV

D. 7,7188 eV

21. Tm nng lng to ra khi mt ht nhn U234 phng x tia to thnh Th230 . Cho nng lng lin kt ring ca ht ; U234, Th230 ln lt l: 7,1 MeV; 7,63MeV; 7,7 MeV.

A. 13,89MeV

B. 7,17MeV

C. 7,71MeV

D. 13,98MeV

22. Pht biu no sau y l sai v phn ng ht nhn : A. ht khi cng ln th nng lng ta ra cng ln B. Cc ht sinh ra bn vng hn cc ht ban u th phn ng ta nng lng C. Cc ht sinh ra km bn vng hn cc ht ban u th phn ng c th t xy ra D. in tch , s khi , nng lng v ng lng u c bo ton 23. Cho phn ng ht nhn: A B + C. Bit ht nhn m A ban u ng yn. C th kt lun g v hng v tr s ca vn tc cc ht sau phn ng? A. Cng phng, cng chiu, ln t l vi khi lng. B. Cng phng, cng chiu, ln t l nghch vi khi lng. C. Cng phng, ngc chiu, ln t l nghch vi khi lng. D. Cng phng, ngc chiu, ln t l vi khi lng.210 24. Ht nhn phng x Plni 84 Po ng yn pht ra tia v sinh ra ht nhn con X. Gi K l ng nng, v l vn tc, m l khi lng ca cc ht. Biu thc no l ng

A.

K vx m = = K X v mX

B.

K v x mx = = K X v m

C.

K v m = = K X v X mX

D.

K v mx = = K X v X m

25. Ht nhn U238 ng yn phn r to thnh ht v ht X. Bit ng nng ca ht X l 3,8.10-2 MeV, ng nng ca ht l: A. 2,22MeV B. 0,22MeV C. 4,42MeV D. 7,2MeV6 1 3 4 26. Cho phn ng ht nhn sau: 3 Li + 0 n 1T + 2 . Phn ng ta ra nhit lng l 4,8MeV. Coi ng nng cc ht ban u khng ng k, ng nng ca ht sinh ra l:

A. 2,74J

B. 4,36J

C. 1,25J

D. p n khc

27. Ht nhn Ra226 ng yn phng x v bin i thnh ht nhn X, bit ng nng K=4,8MeV. Ly khi lng ht nhn (tnh bng u) bng s khi ca chng, nng lng ta ra trong phn ng trn bng A. 1.231 MeV210

B. 2,596 MeV

C. 4,886 MeV

D. 9,667 MeV

28. Ht nhn 84 Po phng x bin thnh ht nhn X. Cho mPo=209,9828u; mX=205,9744u; m=4,0015u;1u=931MeV/c2. ng nng ca ht phng ra l : A. 4,8MeV B. 6,3MeV C. 7,5MeV D. 3,6MeV 29. Ht nhn U238 ng yn phn r v bin thnh ht nhn Th. ng nng ca ht bay ra chim bao nhiu % nng lng phn r ? A. 1,68%. B. 98,3%. C. 16,8%. D. 96,7%.6 1 3 4 30. Cho phn ng ht nhn: 3 Li + 0 n 1T + 2 + 4,9MeV . Gi s ng nng ca cc ht ntron v Li rt nh, ng nng ca ht T v ht l:

A. 2,5 MeV v 2,1 MeV C. 2,8 MeV v 2,1 MeV

B. 2,8 MeV v 1,2 MeV D. Kt qu khc

31. Ht nhn Poloni ng yn, phng x bin thnh ht nhn X. Cho mPo=209,9373u; m=4,0015u; mX=205,9294u; 1u=931,5 MeV/c2. Vn tc ht phng ra l: A. 1,27.107m/s B. 1,68.107m/s C. 2,12.107m/s D. 3,27.107m/s

23 32. Mt proton c ng nng l 4,8MeV bn vo ht nhn 11 Na to ra 2 ht v ht X. Bit ng nng ca ht l 3,2MeV v vn tc ht bng 2 ln vn tc ht X. Nng lng ta ra ca phn ng l :

A. 1,5MeV B. 3,6MeV C. 1,2MeV D. 2,4MeV 6 33. Mt ntron c ng nng 1,15MeV bn vo ht nhn 3 Li to ra ht v ht X, hai ht ny bay ra vi cng vn tc. Cho m =4,0016u; mn=1,00866u; mLi=6,00808u; mX=3,016u; 1u=931MeV/c2. ng nng ca ht X trong phn ng trn l : A. 0,42MeV B. 0,15MeV C. 0,56MeV D. 0,25MeV 34. Mt Proton c ng nng 5,58MeV bn vo ht nhn Na23 , sinh ra ht v ht X. Cho mp=1,0073u; mNa=22,9854u; m=4,0015u; mX=19,987u; 1u=931MeV/c2. Bit ht bay ra vi ng nng 6,6MeV. ng nng ca ht X l : A. 2,89MeV B. 1,89MeV C. 3,9MeV D. 2,MeV 27 35. Mt ht bn vo ht nhn 13 Al to ra ntron v ht X. Cho: m =4,0016u; mn=1,00866u; mAl=26,9744u; mX=29,9701u; 1u=931,5MeV/c2. Cc ht ntron v X c ng nng l 4 MeV v 1,8 MeV. ng nng ca ht l : A. 5,8 MeV B. 8,5 MeV C. 7,8 MeV D. Kt qu khc 36. Ngi ta dng proton bn ph ht nhn Beri ng yn. Hai ht sinh ra l Hli v X: 1 9 4 1 p + 4 Be 2 He + X . Bit proton c ng nng Kp=5,45 MeV, Hli c vn tc vung gc vi vn tc ca proton v c ng nng KHe=4MeV. Cho rng ln ca khi lng ca mt ht nhn (o bng n v u) xp x bng s khi A ca n. ng nng ca ht X bng A. 1,225MeV B. 3,575MeV C. 6,225MeV D. Mt gi tr khc

37. Mt tu ph bng nguyn t c cng sut l phn ng P = 18MW. Nhin liu l urani lm giu cha 25% U235. Tm khi lng nhin liu cn tu hot ng lin tc trong 60 ngy. Cho bit mt ht nhn U235 phn hch to ra Q=3,2.10-11J A. 5,16kg B. 4,55kg C. 4,95kg D. 3,84kg 38. Cng sut ca mt l phn ng ht nhn dng U235 l P = 100.000kW. Hi trong 24 gi l phn ng ny tiu th bao nhiu khi lng urani ni trn? Cho bit trong phn ng phn hch U235, nng lng ta ra l 200MeV A. 100g B. 105,4g C. 113,6g D. 124,8g