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### midterm Q.7b

Posted: **Sun May 06, 2018 11:00 pm**

by **Enzo_1I**

What is the significance/origin of the negative sign in En= -hR/n2 ?

why is the answer "E infinity = 0 " ? I don't understand how this relates to the origin of the negative sign.

### Re: midterm Q.7b

Posted: **Sun May 06, 2018 11:01 pm**

by **Elijah E 1C**

I think the negative sign is to reference the energy lost when changing atomic level.

### Re: midterm Q.7b [ENDORSED]

Posted: **Sun May 06, 2018 11:06 pm**

by **Lily Emerson 1I**

the negative sign just means that bound electrons have lower energy than free electrons. the E(infinity) indicates that, since a free electron could be thought of as just being in a very far-off shell (high n value)

### Re: midterm Q.7b

Posted: **Sun May 06, 2018 11:08 pm**

by **Isabel Jabara 1C**

I think E infinity = 0 is meant to show that the highest energy level is 0, and as you approach n=1 you keep releasing energy, and if you are releasing energy from a value of 0 it must be negative.