Why do chemicals have to be heated in the flame before colored light is emitted?
Question:
Why do chemicals have to be heated in the flame before colored light is emitted?
Choices:
- Electrons must absorb energy first
- The nucleus of the atom must be unstable in order to emit light
- Heat allows colors to be seen more easily than not using heat
- Electrons must emit light in order to jump energy levels
Answer:
Electrons must absorb energy first.