WAEC Past Questions and Answers - Page 3594

Two radioactive elements X and Y have half-lives of 100 and 50 years respectively. Samples of X and Y initially contain equal number of atoms. What is the ratio of the number of the remaining atoms of X to that of Y after 200 years?

The frictional effect between the layers of a moving fluid is called

A radioactive nuclide of proton number X emits a \(\beta\)-particle to form a new nuclide to proton number Y. The correct equation relating X and Y is

The part labelled IV in the diagram is the 

The process of increasing the energy of an atom via inelastic collision with an electron is known as