Num átomo de hidrogênio afasta-se o eletrao do núcleo. A que distância do núcleo é que a força elétrica atrativa é igual ao peso do eletrao à superfície da terra?

Match each object to its description: a. coma of a comet b. comet tail c. oort cloud haze surrounding a nucleus created by solar wind. hypothetical sphere around the solar system

In which block of the periodic table is uranium (u) found? s blockd blockp blockf block

Which substance—wood or silver—is the better thermal conductor? a thermal conductor is a material that requires very little heat energy to change its temperature. explain your answer.