here is another chemistry question from the test.?

Question

Which transition, in a hydrogen atom, is associated with the absorption of light of the shortest wavelength?
1)n=3 to n=1
2)n=2 to n=3
3)n=3 to n=5
4)n=4 to n=1
5)n=1 to n=3

Answer 1

Ok, so as n increases, the energy levels fradually get closer together until they reach a continium, basically the energy difference between n=1 and n=2 will be bigger than that for n=2 and n=3 and so on. Also abosrbtion of light promotes an electron to a higher energy level, so only look at answers where there is an increase in n. Base on what I said, the n=1 -->5 transition will be the highest in energy

Now since E=hc/lambda where h and c are constants and lambda is the wavelength, you know that the shorter the wavelength, the bigger the energy, or put another way - the bigger the energy, the shorter the wavelength.

So we've already figured out that answer 5) has the highest energy transition, and therefore must have the shortest wavelength

hope this helps

Answer 2

Shortest wavelength means greater energy absorbed. There must be a jump for energy absorption. So it's either 2, 3, or 5. The answer's 5 because the energy difference between 1 and 2 is huge.

Answer 3

For the absorption of light to occur, the hydrogen atom must move from a higher energy level to a lower energy level. In this process of transition, it gives of energy which is seen as light.

Since it moves from a higher energy level to a lower energy level, option 2,3 and 5 is wrong.

And using the equation λ= v/f and since v is a constant, which is the speed of light, to find the shortest wavelength, f must therefore be the greatest.

If f is the greatest, the change in energy level must also be the biggest, based on the equation, f=E/h, where E is he energy of the atom, and h, planck's constant.

Therefore, the answer can only be option 4 where the change in energy level is the greatest.

Answer 4

i do no longer know what befell on your lab, so it extremely is puzzling for me to assert what it grew to become into meant to end. diverse colours correspond to diverse power ranges. Flame assessments illustrate an atomic belongings.the two issues you point out. That makes 4. i do no longer know what else your instructor has in ideas. Are you meant to contain discovering the concepts? Did you utilize a prism or grating to make certain different lines? plenty greater relaxing belongings you ought to write approximately in case you probably did.

Answer 5

Hi. Find the two orbits (n) which are closest together, remembering absorption make the electron jump up.

Answer 6

U can have your complete question paper solved at link below