61. (V17-130-16) 227Pa — Rn + x.
56,75 mg protaktiniy yemirilishi natijasida hosil bolgan elektronlar sonini hisoblang.
Pa ning yemirilishidan hosil bolgan Rn massasi Pa nisbatan 7,6% ga kam.
A) 4,515-Ю20 В) 45.15Ю20
C) 9,03-Ю20
D) 90,3-1020
61. (V17-130-16) 227Pa — Rn + x.
56,75 mg protaktiniy yemirilishi natijasida hosil bolgan elektronlar sonini hisoblang.
Pa ning yemirilishidan hosil bolgan Rn massasi Pa nisbatan 7,6% ga kam.
A) 4,515-Ю20 В) 45.15Ю20
C) 9,03-Ю20
D) 90,3-1020
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Ñáîðíèê: Kimyo
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3. Yadro reaksiyalari. Radiaktivlik
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