4. a) Co" has a half-life of 5.2 years. i. Calculate the disintegration constant? ii. Calculate the activity of a 1-gram sample of Co", and express this activity in Curies.
4. a) Co" has a half-life of 5.2 years. i. Calculate the disintegration constant? ii. Calculate the activity of a 1-gram sample of Co", and express this activity in Curies.
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![4. a) Co60 has a half-life of 5.2 years.
i. Calculate the disintegration constant?
ii. Calculate the activity of a 1-gram sample of Co®, and express this activity
in Curies.
b) If the half-life of Nd144 is 2.4x10'5 years, how long does it take for Nd'44 to drop to
10 % of its initial activity?
NA= 6.02x1023 atoms/mol ,MA (Co0) = 59.93 g/mol , MẠ (Nd144)= 143.91 g/mol](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F74a80a24-d9bd-42d5-8f13-97a2df6d1704%2F71dc56ea-2615-4cf8-96b1-d3e7682e4d8f%2Frmbxg9h_processed.png&w=3840&q=75)
Transcribed Image Text:4. a) Co60 has a half-life of 5.2 years.
i. Calculate the disintegration constant?
ii. Calculate the activity of a 1-gram sample of Co®, and express this activity
in Curies.
b) If the half-life of Nd144 is 2.4x10'5 years, how long does it take for Nd'44 to drop to
10 % of its initial activity?
NA= 6.02x1023 atoms/mol ,MA (Co0) = 59.93 g/mol , MẠ (Nd144)= 143.91 g/mol
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