Question

what does the unique color emitted by a metallic element when burned indicate about the energy levels in its atoms? 1. the energy levels are random and unpredictable. 2. the energy levels are identical for all metals. 3. the energy levels are unique to each metal. 4. the energy levels are the same for all non - metals.

Explanation:

When a metallic element burns and emits a unique color, it is due to electrons transitioning between specific energy levels. Each metal has its own distinct set of energy - level differences, which results in unique spectral emissions. So the energy levels are unique to each metal.

Answer:

1. The energy levels are unique to each metal.