Question

The half life period of a radioactive element is 120 days. After 600 days one gram of the element will reduce to ..
a). (1/4) g
b). (1/8)g
c). (1/16)g
d). (1/32)g​

Answer 1

Answer:

Correct option is

D

16

1

g

T=n×t

1/2

Given, t

2

1

=140 days

N

0

=1 g

∴n=

t

1/2

T

=

140

560

=4

Now, Nt=N

0

(

2

1

)

n

=1×(

2

1

)

4

=

16

1

g