Question

a mineral originally contained 1,000 radioactive parents. after two half-lives have passed the mineral will contain parent atoms and daughter atoms. enter in the correct numerical values.

Answer 1

N = N0 / 4

After 2 half-lives 1/4 of the original N0 will be present

250 - number of parent atoms left

750 - number of daughter atoms present

Answer 2

After two half-lives, the mineral will contain 250 parent atoms and 750 daughter atoms.

Step-by-step explanation:

The question states that a mineral originally contained 1,000 radioactive parent atoms. After two half-lives have passed, we need to determine the number of parent atoms and daughter atoms remaining.

Each half-life reduces the number of parent atoms by half. So after one half-life, there will be 500 parent atoms remaining. After two half-lives, there will be 250 parent atoms remaining.

Since the mineral contains 1,000 parent atoms originally, after two half-lives, it will contain 250 parent atoms and 750 daughter atoms.