Please tell me and why ?

Compare and contrast the bohr model and the electron cloud models of the atom.

Two solids are mixed in a flask and stirred. after a few minutes, the flask becomes cold. which of the following best describes this reaction? a. an exothermic reaction b. a combustion reaction c. an endothermic reaction d. a decomposition reaction

Type the letter that represents the correct location for each particle type below. the neutron is found at __ the electron is found at __ the proton is found at __