In a given sample there are 10,000 radio-active atoms of half-life period 1 month. The number of atoms remaining without disintegration at the end of 3 months is :
ACan't be calculated
B5,000
C2,500
D1,250
Answer:
D. 1,250
Read Explanation:
Half life is the time required for a quantity to reduce to half its initial value.
Half-life period of the given sample = 1 month
That is, the total time required for the sample to be half its present amount is 1 month.
Given in the question, 10000 radio-active atoms are present in the given sample.
These 10,000 radio-active atoms halve to 5000 atoms in 1 month.
These 5000 radio-active atoms halve to 2500 atoms in 2 months.
These 2500 radio-active atoms halve to 1250 atoms in 3 months.
