| Question #1 | 

| a. | Which element is it? | 
| b. | Approximate the energy associated with the green line shown in the spectrum? | 
| c. | Is the energy associated with the green line more or less than the energy associated with the yellow line? | 
| d. | A particular element is known to have an emission line resulting from the transition between two levels with an energy difference of 4.0 x 10-19 joules. Could the above spectrum belong to the element? |