Fermium-253 has a half life of 3 days. What percent of the sample is still Fermium-253 after 15 days?

.

Explanation:

After every half-life, the quantity of the sample will become of the quantity at the beginning of the half-life. If the half-life for Fermium-253 is 3 days, it can be deduced that:

.

Let . In general, after half-lives (for the fermium-253 in this question, that would be days,) the percentage of the sample that's still the initial substance would be:

.

There are half lives in 15 days. (In other words, .) Therefore, the percentage of this sample that's still fermium-253 would be:

.

convalent bond :

is a chemical bond formed by the sharing of electron between 2 atoms.

it is the direct chemical bond between 2 atoms.

in bond formation atoms are involved here.

electrovalent bond:

is a chemical bond defined as electroststic attraction between 2 atoms.

it is the electrostatic attraction between 2 atoms.

in bond formation, ions are involved here.

hope it

and ur welcm

: )