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1mg. If the half life is 24 minutes then in 48 minutes the sample would decay twice. After one half life the mass would halve (to 2mg) and after the second it would have again (to 1mg).
1mg
0.25
1 mg
1 mg
Lawrencium has a half-life of about 215 minutes. After 30 minutes, about 85% of the original sample would remain. Therefore, approximately 4.25 grams of lawrencium would still be present in a 5-gram sample after 30 minutes.
1mg. If the half life is 24 minutes then in 48 minutes the sample would decay twice. After one half life the mass would halve (to 2mg) and after the second it would have again (to 1mg).
After 48 minutes, two half-lives have passed for Cu-60 (24 min * 2 = 48 min). Each half-life reduces the amount of Cu-60 by half, so after 48 minutes, only 1/4 of the original 4 mg sample would remain, which is 1 mg.
1mg. If the half life is 24 minutes then in 48 minutes the sample would decay twice. After one half life the mass would halve (to 2mg) and after the second it would have again (to 1mg).
Lawrencium is not a commercial product.
5g would remain
We would expect Lawrencium to react with other elements similar to the way scandium or yttrium do, these being in the same column of the periodic table. However, lawrencium is highly radioactive, and most of the isotopes have half-lives in the seconds; the longest lived isotope has a half-life of 40 minutes, so that doesn't give chemists much time to work with it.
1mg
0.5 mg
.25 mg
The mass is 1,075 g.
1 mg