Energy Sublevels

Question 1

What was it discovered about the lines that were formed in emission spectra?

Answer 1

They were thought to be single lines but they actually consisted of a number of lines very close together

Question 2

It was discovered that the single lines that were formed in emission spectra were actually a number of lines very close together, what does not cause this?

Answer 2

These lines could not have resulted from electrons dropping to two different energy levels as this would have given rise to lines much farther apart in the spectrum

Question 3

It was discovered that the single lines that were formed in emission spectra were actually a number of lines very close together, what was proposed to explain this?

Answer 3

It was proposed that each main energy level, except the first, was made up of a number of sublevels all of which were close in energy

Question 4

From the analysis of spectra, what was discovered?

Answer 4

It was discovered that the number of sublevels was the same as the value of n for the main energy level

Question 5

How many sublevels are there in the n=2 main energy level?

Answer 5

There are two

Question 6

How many sublevels are there in the n=3 main energy level?

Answer 6

There are three

Question 7

How many sublevels are there in the n=4 main energy level?

Answer 7

There are four

Question 8

How were the sublevels labelled?

Answer 8

They were labelled using the letters s, p, d and f

Question 9

What is the lowest sublevel of lowest energy called?

Answer 9

s

Question 10

Give the order of the sublevels starting with the one with the lowest energy.

Answer 10

s

p

d

f

Question 11

What is different about the 4s sublevel?

Answer 11

It is lower in energy than the 3d sublevel