Question

analysis questions: 1. how did the electrons in the elements you observed become \excited\? gases - solids - 2. when do electrons emit light energy? 3. why do only certain colors appear in the emission spectra of elements? electrons transition between discrete energy levels, emitting photons of specific energies 4. if each hydrogen atom contains only one electron, how are several emission spectra lines possible? single electron can make multiple transition to different energy levels 5. in a bright - line spectrum, (or emission spectrum), how can the difference in the brightness of spectra lines be explained? related to number of electron making a particular transition

Explanation:

1. Gases - Electrons in gases become excited when they absorb energy, often through heat or electrical discharge. Solids - In solids, electrons can be excited by heat, light, or an electric field.
2. Electrons emit light energy when they return from a higher - energy excited state to a lower - energy state.
3. Only certain colors appear in the emission spectra of elements because electrons transition between discrete energy levels, emitting photons of specific energies corresponding to specific colors.
4. Each hydrogen atom has one electron, but it can make multiple transitions to different energy levels, resulting in several emission spectra lines.
5. In a bright - line spectrum, the difference in the brightness of spectra lines is related to the number of electrons making a particular transition. More electrons making a transition result in a brighter line.

Answer:

1. Gases: Absorb energy (heat/electrical discharge). Solids: Heat, light or electric field.
2. When returning from excited to lower - energy state.
3. Due to discrete energy level transitions.
4. Single electron can make multiple energy - level transitions.
5. Related to number of electrons in a particular transition.