» » » The half life of a radioactive substance is 2 seconds. Calculate the decay const...

# The half life of a radioactive substance is 2 seconds. Calculate the decay const...

### Question

The half life of a radioactive substance is 2 seconds. Calculate the decay constant

A)
0.035s
B)
0.347s
C)
0.151s
D)
0.576s

### Explanation:

Half life, $$T_{½}=2$$
$$T_{½}=0.693÷\lambda$$
$$\lambda=0.693÷T_{½}$$
$$\lambda=0.693÷2$$s
$$\lambda=0.3465$$s
$$\lambda\approx 0.347$$s

## Discussion (3)

• Half life, $$T_{½}=2$$
$$T_{½}=0.693÷\lambda$$
$$\lambda=0.693÷T_{½}$$
$$\lambda=0.693÷2$$s
$$\lambda=0.3465$$s
$$\lambda\approx 0.347$$s