Each isotope has another half life.
For the isotope francium-223 (half life = 21,8 minutes) the time is 87,2 minutes.
1gram is about 15.43gr
1gram=1gram or 0,0352739619 ounce
A nail weighs about one gram. This can vary depending on the size of the nail and what the nail is made of.
it is 1gram
1gram
$11,294,290.87
1gram
No.
1gram
28.35 grams
$18.56
6.02*1023