13.13 What is activity, decay constant and half life

[@Jshahk]

So well explained, thank you!

[@MrNagaPhysics]

You're wellcome.

[@jayceel251]

this was so useful thank you so much

[@MrNagaPhysics]

Glad you found it helpful.

[@osmansadat9650]

hi, for the last question that you went through why did the minus go away from the decay constant?

[@MrNagaPhysics]

The negative shows that the number of isotopes is decreasing because it is decaying. The question is more concerened with the magnitude of the change instead. But it should be there. You should get marks for giving positive or negative.