Radioactive decay can be described by the following equation In A = In Ao – kt
where Ao is the original amount of the substance, A is the amount of the substance remaining after timet,
and k is a constant that is characteristic of the substance.
For the radioactive isotope chromium-56, k is 1.17 x 10-2 minutes
If the original amount of chromium-56 in a sample is 38.8 mg, how much chromium-56 remains after 6.20
minutes have passed?
mg

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

the answer to this question is 3.

може ли да зареждате повече информация, моля