3N mire. Viing lai hoa ds cdn 3N miic trdng nen kim loai chuyen tiep dandien tdt.Cac kim loai dan
nhiet tdt nhd kha nang di chuyen tu do ciia cac electronhoa tri trong tinh the
va truyen nang lugng tir phan ndng hon sang phan lanhhon. Khi dun ndng, dao ddng cua cac nguyen tir ta[r]