ELECTRON STRUCTURE (OCR)

Question 1

What are electron shells/energy level numbers called?

Answer 1

Principal Quantum numbers (n)

Question 2

What are electron shells/energy levels made of?

Answer 2

Atomic Orbitals

Question 3

How many electrons can each atomic orbitals hold?

Answer 3

Two each ((with opposite spin))

Question 4

What are the different atomic orbital letters?

Answer 4

s, p, d, and f.

Question 5

What shape is an S orbital?

Answer 5

Sphere

Question 6

What shape is a P orbital?

Answer 6

Dumbbell/bow shaped

Question 7

What are subshells?

Answer 7

Groups of orbitals of the same type.

Question 8

What are the maximum electrons that can be held in the first subshell?

Answer 8

Two

Question 9

What are the maximum electrons that can be held in the second subshell?

Answer 9

Eight

Question 10

What are the maximum electrons that can be held in the third shell?

Answer 10

Eighteen

Question 11

What are the maximum electrons that can be held in the fourth shell?

Answer 11

Thirty-two

Question 12

How do orbitals fill?

Answer 12

In order of increasing energy singly before pairing.

Question 13

What is the electron configuration of Helium?

Answer 13

1s2, 2s1

Question 14

What are positive ions called?

Answer 14

Cations

Question 15

What are negative ions called?

Answer 15

Anions

Question 16

How is the periodic table divided? (in terms of highest subshell energy))

Answer 16

First two groups- S-block

Right block of six groups - P-block

Centre block of ten groups - D-block

Question 17

In terms of the 4s block and 3d block which fill/empty first?

Answer 17

The 4s subshell