fast and explain how to solve half life

a 208 grams sample of sodium-24 decays to 52 grams in 30 hours. what is the half-life
of this radioactive sample?

In apex! a liquid heated beyond a certain temperature becomes

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules

Energy defines the different "states" of matter. in no more than 3 sentences, describe the amount of kinetic energy that each of the 3 states of matter possesses and relate that to the atom/molecular motion of each "state".