Plz explain these points .... ()ve 3 m, the colour changes to copper-bronze

For metallic lustre...reason.- as there are presence of loosely bounded electrons...so when sunlight falls on electron the electron oscillates and emit continuous radiation and the...

hope this much helps u shweta😊

got it Shweta??

shweta see when alkali metal cations is dissolved in liq Nh3 it forms ammoniated cations and ammoniated anions the ammoniated electrons absorbs energy from visible region and emits...