1.4 + 1.5

Question 1

What is electronic configuration?

Answer 1

The arrangement of electrons in an atom

Question 2

How are electrons arranged around the nucleus?

Answer 2

In energy levels

Question 3

Principle Quantum levels refer to the energy levels. What does a high principal quantum level mean?

Answer 3

The shell has high energy levels and is further away from the nucleus

Question 4

what are the fixed numbers of electrons that can be held by each shell?

Answer 4

n = 1: up to 2 electrons
n = 2: up to 8 electrons
n = 3: up to 18 electrons
n = 4: up to 32 electrons

Question 5

What happens to the energy levels as you move away from the nucleus?

Answer 5

The energy levels get closer together with an overlap between the 3rd and 4th level.

Question 6

The main energy levels (or shells) are split into sub-shells. What do they consist of and what are they?

Answer 6

They consist of one or more atomic orbitals

The sub-shells are s,p,d, and f with an increasing energy

Question 7

What is the shape of the s-orbital?

Answer 7

It is spherical and it becomes larger when the number of shells increases

Question 8

What is the shape of the p-orbital?

Answer 8

It has a dumbbell shape. shells containing the p-orbital will have 3 orbitals that are perpendicular to each other. The orbital becomes longer and larger with an increase in shell no.

Question 9

Why do you fill the 4s orbital before the 3d orbital?

Answer 9

Because the 4s orbital has less energy than the 3d orbital