Due to its metabolism, a living being can get rid of some of the isotope's atoms before they decay.
6 to 7 hours
It depends on what form of Kenalog you are being treated with. Kenalog can be a topical cream, a spray, taken orally, or given as a deep muscle injection. Kenelog can have a half life as short as 88 minutes, as listed on the Wikipedia site, but that is for the shorter acting methods of using the drug. It can also be as long as three weeks, when given as a deep muscle injection.
You say 'I've missed Half my life' which is short for : "I have missed half my life'
No. Half-Life: Source runs on the Source engine. The original Half-Life doesn't. You cannot use mods made for the original Half-Life on Half-Life: Source because they run on different engines and it won't work.
no, but you do need a source game like Half Life, Half Life2, or Team Fortress2
It depends on the radioisotope. They do not all have the same half life.
It is 11.2 years.
It is 252 days.
It is 432 years.
It is 2.6 years.
It is 15.02 hours.
It is 14.6 years.
It is 300,000 years.
It is 5.27 years.
It is 18.11 years.
It is 14.1 hours.
It is 7,380 years.