Chemistry: Electron Arrangement

Question 1

What are electrons found within?

Answer 1

orbitals

Question 2

What are orbitals?

Answer 2

region in space where one is likely to find an electron

Question 3

What shape is an s orbital?

Answer 3

spherical

Question 4

What shape is a p orbital?

Answer 4

dumbbell

Question 5

What shape is a d orbital?

Answer 5

four leaf clover

Question 6

State the Aufbau principle

Answer 6

electrons enter lowest available energy level

Question 7

State Paulis Exclusion Principle

Answer 7

no orbital can hold more than two electrons

Question 8

State Hunds rule

Answer 8

orbitals of same energy level fill singly before repairing- due to repulsion

Question 9

How many electrons can an orbital hold?

Answer 9

two electrons

Question 10

What are the four types of orbitals

Answer 10

s/p/d/f-orbital

Question 11

How many electrons can s orbitals hold?

Answer 11

2

Question 12

How many electrons can be held in the p-sub-level?

Answer 12

6 (2 in each group of 3)

Question 13

How many electrons can the d-sub-level hold?

Answer 13

10 (2 in each group of 5)

Question 14

How are orbitals filled?

Answer 14

in order of increasing energy

Question 15

Write the order in which orbitals fill

Answer 15

1s / 2s / 2p / 3s / 3p / 4s / 3d / 4p / 5s / 4d / 5p / 6s / 4f / 5d

Question 16

What are the two exceptions to the trend in electron configurations?

Answer 16

chromium and copper

Question 17

What is the electronic configuration for copper?

Answer 17

1s2 / 2s2 / 2p6 / 3s2 / 3p6 / 3d10 / 4s1

Question 18

What is the electronic configuration for chromium?

Answer 18

1s2 / 2s2 / 2p6 / 3s2 / 3p6 / 3d5 / 4s1

Question 19

Why do copper and chromium deviate from what is expected in electronic configuration?

Answer 19

-electron moves from 4s sub level to produce 1/2 filled 3d or completely filled 3d sub level
-provides atom with greater stability, favourable