(Help me out ) When a single electron returns to the ground state from an excited state, it emits___

1. A continuous spectrum of all wavelengths of light

2. A line spectrum of 2 or more wavelength of light

3. A single, specific wavelength of light

4. No light

3) A single specific wavelength

Explanation:

When an electron returns to ground state, it has to emit a single photon.

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.