|
1. 197Au atomining yadrosining necha foizi neytronlardan iborat?
A) 61,3 B) 38,7 C) 40,1 D) 59,9
2. Quyidagi elementlardan qaysi birida elektronlar butun zarrachalarning 30,43% ini tashkil qiladi?
A) 75As B) 80Br C) 84Kr D) 80Se
3. Tarkibida 32 ta proton, 57,33% neytroni bor atomga izobar bo`lgan element atomlarini toping.
1) Ge-74 2) Ge-75 3) As-75
4) As-76 5) Se-75 6) Se-76
A) 3, 5 B) 4, 6 C) 1, 6 D) 2, 3
4. Tarkibida 52,54% neytroni bor nikel atomiga izoton bo`lgan element atomlarini ko`rsating.
l) Fe-56 2) Fe-57 3) Co-58 4) Co-59
A) 2, 4 B) 1, 4 C) 1, 3 D) 2, 3
5. Izotop yadrosi 57 ta n va 43% p dan iborat bo’lgan izotopni toping.
A) Ts-100 B) Ts-99 C) Cr-57 D) Mn-57
6. Atom yadrosi tarkibida 43,75% proton va 54 ta neytron bo’lgan elementning izotoplarini ko’rsating.
1) Nb-95 2) Ts-96 3) Mo-95
4) Mo-99 5) Ts-100
A) 3, 4 B) 1, 2 C) 1, 3 D) 4, 5
7. Yadrosining tarkibi 45% proton va 55% neytrondan iborat bo’lgan hamda yadrosi atrofida 18 ta elektron harakatlanadigan elementning izobarlarini aniqlang.
1) 42Ar 2) 43Ar 3) 40K 4) 40Ca 5) 45Ca
A) 3, 4 B) 1, 2 C) 4, 5 D) 2, 5
8. Yadrosining tarkibi 43,75% proton, 56,25% neytrondan iborat bo’lgan hamda yadrosi atrofida 14 ta elektron harakatlanadigan elementning izotonlarini ko’rsating.
1) Si-28 2) Si-30 3) P-32 4) S-32 5) S-34
A) 5 B) 1, 2 C) 3, 4 D) 2, 3, 5
9. Tarkibida 33 ta proton, 56% neytroni bor atomga izobar bo’lgan element atomlarini ko’rsating.
1) Ge-74 2) Ge-75 3) As-72
4) As-76 5) Se-75 6) Se-76
A) 2, 5 B) 1, 6 C) 5, 6 D) 3, 4
10. Element atomidan 4 ta e- ajralgandan so’ng, 92% elektroni qoldi. Shu iondagi p va e sonini aniqlang.
A) 50p, 46e B) 54p, 50e
C) 50p, 50e D) 46p, 50e
11. Misning nisbiy atom massasi 63,54 bo’lsa, uning ikkita izotopi 63Cu va 65Cu lardan 63Cu ning mol ulushini (%) hisoblang.
A) 27 B) 64 C) 36 D) 73
12. Atomning massasi 5,845 ∙10-26 kg ga teng. Uning yadrosidagi protonlar soni 17 ta ekan-ligi ma’lum bo’lsa, undagi neytronlar sonini toping
A) 17 B) 18 C) 19 D) 20
13. Atomning massasi 6,179 ∙10-26 kg ga tengligi va undagi protonlar soni 17 ekanligi ma’lum bo’lsa, undagi neytronlar sonini toping.
A) 17 B) 18 C) 19 D) 20
14. Massasi 6,179∙10-26 kg va 5,845∙10-26 kg bo’lgan atomlarda mos ravishda 20 va 18 tadan neytron borligi ma’lum bo’lsa, ulardagi protonlarning sonini toping.
A) 20 va 20 B) 19 va 19
C) 17 va 17 D) 18 va 17
15. Atomning massasi 7,31·10-26 kg ga teng. Uning yadrosidagi protonlar soni 21 ta ekanligi ma’lum bo’lsa, undagi neytronlar sonini toping.
16. Atom massasi 40 m.a.b bo`lgan atomda neytronlar soni protonlardan 4 ta ko`p. Atomdagi neytron sonini toping.
A) 18 B) 20 C) 21 D) 22
17. 3 kg kumushda qanday massadagi (g) elektron mavjud? (me= 1/1823 m.a.b.)
A) 0,72 B) 0,96 C) 1,24 D) 1,67
18. 1 mg elektron saqlagan temirning massasini (g) aniqlang. (elektronning massasi 9,1∙10-31 kg)?
A) 2,94 B) 3,93 C) 2,25 D) 3,12
19. (03-3-37). E3+ ioni tarkibida 118 ta neytron va 76 ta elektron bo’ladi. Shu elementning atom massasi necha teng?
A) 118 B) 121 C) 79 D) 197
20. Cr+6 ionidagi elektronlar soni X-2 ionidagi elektronlardan 8 ta ko’p. X elementini toping.
A) C B) Mg C) Ne D) O
21. Ca+2 ionidagi elektronlar soni X-1 ionidagi elektronlar sonidan 1,8 marta ko’p X ni aniqlang?
A) F B) O C) Ne D) N
22. X atomida proton soni 17 ta, neytron soni elektron sonidan 3 ta ko’p. Atom massani toping.
A) 35 B) 37 C) 20 D) 39
A) 21 B) 22 C) 23 D) 24
23. X+3 ionida proton soni 21 ta, neytron soni elek-tron sonidan 6 taga ko`p. Atom massani toping.
A) 27 B) 45 C) 44 D) 30
24 X+3 va X+5 ionlarining elektronlari yig’indisi 22’dir. Bunga ko’ra X’ning yadro zaryadi necha?
A) 7 B) 11 C) 13 D) 15
25. Y+3 va X-2 izoelektronlardir. Y ning yadro zaryadi 21 bo`lsa, X ning protonlar sonini toping.
A) 18 B) 16 C) 23 D) 26
26. X-2 ionining elektronlar soni Ti+2 ionining elek-tronlar sonidan 2 marta kam bo’lsa, titanning yadro zaryadi X’ning yadro zaryadidan necha marta katta?
A) 2 B) 1,6 C) 2,75 D) 3
27. Tabiatda tarqalgan oltingugurtning 78,6% ini 32S izotopi, 13,4% ini 34S izotopi va 8% ini 35S izotopi tashkil qiladi. Oltingugurtning o’rtacha nisbiy atom massasini toping.
A) 32,47 B) 32,44 C) 32,51 D) 33,13
28. Uglerod tabiatda ikki barqaror izotop: 12C (98,892%) va 13C (1,107%) ko’rinishida bo’la-di. Uglerod elementining atom massasini aniqlang.
A) 12,0172 B) 11,84 C) 12 D) 12,011
29. Tabiatda tarqalgan magniyning 78,6% ini 24Mg izotopi, 10,1% ini 25Mg izotopi va 11,3% ini 26Mg izotopi tashkil qiladi. Magniyning o’rtacha nisbiy atom massasini toping.
A) 24,43 B) 24,33 C) 24,53 D) 24,13
30. Tabiiy xlor atom massalari 35 va 37 bo’lgan izotoplardan tashkil topgan. Ularning mas-sa ulushlarini foizda aniqlang. 35,453Cl – xlorning o’rtacha atom massasi.
A) 77,3; 22,7 B) 76,4; 23,6
C) 74,6; 25,4 D) 75,6; 24,4
31. Tabiiy rubidiy tarkibida ikkita izotop 85Rb va 87Rb bo’ladi. Rubidiyning nisbiy atom massasi 85,47 ga teng. Har qaysi izotopning massa ulushini foizlarda aniqlang.
A) 75; 25 B) 72; 28 C) 76; 24 D) 47; 53
32. Tabiatda uranning ikkita izotopi mavjud – 235U va 238U. Agar elementning o`rtacha atom massasi 237,85 bo`lsa, izotoplarning tarqalish foizi qanday?
A) 15 va 85 B) 85 va 15
C) 95 va 5 D) 5 va 95
33. Tabiatdagi misning o’rtacha nisbiy atom massasi 63,5. Uning 63Cu va 65Cu izotop-laridan iboratligi ma’lum. Tabiiy misdagi 63Cu izotopining massa ulushini (%) toping.
A) 25 B) 45 C) 55 D) 75
34. O’rtacha nisbiy atom massasi 69,72 bo’lgan galliy elementining tabiatda 71Ga va 69Ga izotoplari mavjud. Ularning tabiatdagi massa ulushlarini toping.
A) 36 va 64 B) 56 va 44
C) 38 va 62 D) 42 va 58
Do'stlaringiz bilan baham: |
