I found a rock that contains 1g of radioactive Radium (half-life = 1600 years). I measure that 15g is no longer radioactive. How old is my rock?

Respuesta :

Answer:

The rock now is dead

Step-by-step explanation:

Because if 1g was half life time then 2g are the hole life of the rock

The age of the rock is of 15*1600=24000