Вопрос школьника по предмету Физика
какой элемент образуется в результате а распада 146 62 Sm
какой элемент образуется в результате а распада 212 83 Bi
… а распада 212 84 Po
… а распада 142 58 Ce
… а распада 151 67 Ho
… b распада 14 6 C
Ответ учителя по предмету Физика
¹⁴⁶₆₂Sm ⇒ ⁴₂He + ᵃₓY
Закон сохранения массового числа:
146=a+4 ,a=142.
Закон сохранения заряда:
62=x+2 .x=60.
ᵃₓY = ¹⁴²₆₀Nd
¹⁴⁶₆₂Sm ⇒ ⁴₂He + ¹⁴²₆₀Nd.
²⁰⁸₈₃Bi ⇒ ⁴₂He + ²⁰⁴₈₁Tl
²¹²₈₄Po ⇒ ⁴₂He + ²⁰⁸₈₂Pb
¹⁴²₅₈Ce ⇒ ⁴₂He + ¹³⁸₅₆Ba
¹⁵¹₆₇Ho ⇒ ⁴₂He + ¹⁴⁷₆₅Tb
¹⁴₆C ⇒ ⁰₋₁e + ¹⁴₇N
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