#4 . Thallium-201 has a half life of 73 hours. If 4.0 mg of thallium-201 disintegrates over a period of 6 days and 2 hours how many mg of thallium will remain

When the volume and number of particles of a gas are constant which of the following is also constant

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this