Could someone knowledgeable in pchem explain how this works? I'm guessing that half of the substance doesn't deterministically decay after a specific amount of

Could someone knowledgeable in pchem explain how this works? I'm guessing that half of the substance doesn't deterministically decay after a specific amount of time. I imagine that the decay follows some probability distribution, which should mean some portion of the substance decays much faster or slower, right? Does some of it never decay at all?