EL3

Question 1

What is the maximum number of electrons that can be held in the first four shells?

Answer 1

(n = 1) 2 electrons
(n = 2) 8 electrons
(n = 3) 18 electrons
(n = 4)  32 electrons

Question 2

What are the four sub-shells?

Answer 2

s, p, d and f

Question 3

How many electrons can each sub-shell hold?

Answer 3

s - 2
p - 6
d - 10
f - 14

Question 4

Which sub-shell does the n = 1 shell have?

Answer 4

s-sub-shell

Question 5

Which sub-shell does the n = 2 shell have?

Answer 5

s and p

Question 6

Which sub-shell does the n = 3 shell have?

Answer 6

s, p and d

Question 7

Which sub-shell does the n = 4 shell have?

Answer 7

s, p, d and f

Question 8

How many orbitals does an s-sub-shell have?

Answer 8

one s-orbital

Question 9

How many orbitals does a p-sub-shell have?

Answer 9

three p-orbitals

Question 10

How many orbitals does an d-sub-shell have?

Answer 10

five d-orbitals

Question 11

How many orbitals does an f-sub-shell have?

Answer 11

seven f-orbitals

Question 12

What information is needed when describing an electron?

Answer 12

• the electron shell it is in
• its sub-shell
• its orbital within the sub-shell
• its spin

Question 13

What shape do atomic orbitals have?

Answer 13

three dimensional shape

Question 14

What does the 3D shape of atomic orbitals represent?

Answer 14

Represents the volume of space where there is a high probability of finding 1/2 electrons.