Module 2: Electron Structure

Question 1

Max no. Of electrons in the 1st energy level

Answer 1

2

Question 2

Max no. Of electrons in the 2nd shell

Answer 2

8

Question 3

Max no. Of electrons in the 3rd shell

Answer 3

18

Question 4

Max no. Of electrons in the 4th shell

Answer 4

32

Question 5

Max no. Of electrons in the 5th shell

Answer 5

50

Question 6

Definition of an orbital

Answer 6

Region around the nucleus that can hold up to 2 electrons with opposite spin

Question 7

What shape are s orbitals

Answer 7

Spherical

Question 8

What shape are p orbitals

Answer 8

Dumbbell shaped

Question 9

How many p orbitals are there??

Answer 9

3

Question 10

How many d orbitals are there??

Answer 10

5

Question 11

How many f orbitals are there??

Answer 11

7

Question 12

What is a shell?

Answer 12

A shell is a complete group of orbitals having the same principle quantum number

Question 13

What does the energy of an orbital depend on??

Answer 13

How far the electron is from the nucleus

Question 14

What is the Aufbow principle??

Answer 14

Electrons will always occupy the lowest available energy levels first

Question 15

Pauli exclusion principle

Answer 15

If 2 electrons occupy one orbital they must have opposite spins

Question 16

Hund’s rule

Answer 16

When 2 or more electrons occupy a set of degenerate orbitals they occupy them:

Singly
With parallel spins before spin paring in any one orbital