1. kimyoning asosiy tushuncha va qonunlari 1

49.20,56 mg Fm parchalanganda 2,408 · 10²⁰ ta elektron hosil bo`lsa, Bk izotopining massasini aniqlang.
A) 245 B) 247 C) 241 D) 243
50.109 mg fransiy parchalanganda (<sub>87</sub><sup>218</sup>Fr = Tl + Xa + y<sub>__</sub>B+2<sup>1</sup><sub>0</sub> n) 12.04<sup>.</sup>10<sup>19</sup> elektron xosil bo`lsa, reasiya natijasida olingan talliy izotopning nisbiy atom massasini toping.
A) 196 B) 204 C) 194 D)200
51²⁵³₉₈Cf → x ⁴₂ |a+y_B+Cm 63,25 mg kaliforniy yemirilishidan 6,02•10²⁰ dona elektron ajralgan bo`sla , reyaksiya natijasida hosil bo`lgan kyuriy ioto`pining nisbiy atom massasini aniqlang.
A)234 B)247 C)241 D)238
52.²⁵³ Cf → 4a+y_B+Cm 63.25 mg kaliforniy yemirilishidan 6.02·10 ²⁰ dona electron ajralgan bo’lsa, kyuriy izotopining nisbiy atom massasini aniqlang.
A) 234 B) 247 C) 241 D) 238
53. ²⁵³ Es → ²³¹ U +x 4 a +y _B+ 5 n ushbu yadro reaksiyasi asosida 12.6 mg eynshteyniy yemirilishidan hosil bo’lgan elektronlar sonini hisoblang?
A)12.04•10¹⁹ B)6.02•10¹⁸ C)18.06•10²¹ D)3.01•10²⁰
54.70,5 mg plutoniy parchalanganda (²³⁵ Pu → Th + xα + yn 36.12×10¹⁹ dona neytron hosil bo'lsa, reaksiya natijasida olingan toriy izotopidagi neytronlar sonini aniqlang.
A) 135 B) 140 C) 225 D) 230
55. 75 mg eynshteyniy parchalanganda (²⁵⁰Es=U+xα+y_β+3n) 18.06·10¹⁹ dona electron hosil bo’lsa, reaksiya natijasida olingan Uran izatopidagi neytronlar sonini aniqlang.
A) 139 B) 146 C) 142 D) 231
56. protaktiniy izotopi parchalanganda (Pa=²⁰⁰Pb+xα+y_β+6n) 60mg Pb va 54,18 10¹⁹ dona electron hosil bo’ldi. Reaksida qatnashgan protaktiniyning nisbiy atom massasini hisoblang.
A) 232 B) 230 C) 236 D) 228