If the half-life of a radioactive substance is 2 seconds, how much of a 100-gram sample would be left after 8 seconds?

Which answer lists the fundamental forces in order from strongest to weakest

What happens to the atomic radius when an elctron is lost

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?