Arrangment of electrons

Question 1

What number is each energy shell called

Answer 1

-Principle quantum number (n) where n=1 is the lowest energy level

Question 2

What is an atomic orbital

Answer 2

-An atomic orbital is a region of space around an atomic nucleus where there is a high probability of finding an electron

Question 3

what is the shape of an s-orbital

Answer 3

-Spherical shape

Question 4

what is the shape of p-orbital

Answer 4

-Dumbbell shape

Question 5

How many p-orbitals are there

Answer 5

-3 separate p-orbitals with different orientation to each other
-each p-orbital can hold up to 2 e

                     (3x2=6)

Question 6

How are electrons represented in an orbital

Answer 6

-Two electrons in an orbital must have opposite spin

Question 7

How are orbitals occupied

Answer 7

-Orbitals are occupied with one electron first before pairing starts to reduce repulsion

Question 8

what is Hunds rule

Answer 8

-Electrons prefer to occupy orbitals on their own, and only pair up when no empty orbitals of the same energy level are available

Question 9

What is Aufbau principle

Answer 9

-Electrons enter the lowest energy shell orbital available

Question 10

From where are electron lost when ions form

Answer 10

-The highest energy electrons are lost
(Note that 4s electrons are lost before 3d)

Question 11

What are the exceptions in electron arrangment

Answer 11

-Cu : [Ar] 4s1 3d10

-Cr : [Ar] 4s1 3d5