下列哪些元素是通过光谱分析法被发现的（）
A.CsB.RbC.NaD.KE.ClF.I正确答案：Cs；Rb

Thes analysis etechniques for chemical composition could be classified as（）（光谱学）, which is study of the interaction between matters and radiated energy.

正确答案：spectroscopy