3.flame reaction Na黄 K紫 Ca橙（砖）红 Li Na K Sr深（洋）红 Ba黄绿 L深（洋）红 hu excitated Ca Sr Ba3.flame reaction Na 黄 K 紫 Ca 橙(砖）红 Sr 深（洋）红 Ba 黄绿 Li 深(洋)红 excitated h