Question

How long will it take for a radioactive element having half-life of 0.693 years to decrease

its 10% of radioactive material?

(A) 2.303 years

(B) 2.303 days

(C) 2.303 minutes

(D) 2.303 seconds​

Answer 1

Answer:

0.693

Explanation:

K=2.303tlogaa−x [t=2.303(given)(a−x)=110a0]

=2.303tlog1a/10=1

∴t1/2=0.693K=0.6931=0.693