Cau 24: Cong thoat cua electron cua kim loai la A A. nang luong toi thieu de ion hoá nguyen tu kim loai. B. nang luong toi thieu de but nguyen tu ra khoi kim loai C. nang luong can thiet de but electron tang K nguyen tu kim loai D. nang luong cua photon cung cap cho nguye...