WAEC Past Questions and Answers - Page 4135

Which of the following are emitted from a radioactive substance without altering either the nucleon number or the proton number of the substance?

When an atom is in the ground state, it is said to be

Eight or - particles and size B - particles are emitted from an atom of ₉₂²³⁸U before it achieves stability. What is the nucleon number of the final product in the chain reaction?

According to the kinetic theory of gases, the collision of the molecules of a gas with the wall of the container is mainly responsible for the

I. temperature of the gas
II. viscosity of the gas
III. pressure of the gas

Which of the statements above is/are correct?

Which of the following is used as nuclear reactor to slow down fast moving neutrons?