Topic 9 - Chemical Periodicity (Group 3)

Question 1

Period 3

Variation in atomic radius

Answer 1

Decreases across the group due to an increase in nuclear charge

Question 2

Period 3

Variation in Ionic Radius

Answer 2

Decreases for ioselectronic ions

Question 3

Describe the trend in melting point

Answer 3

Giant Covalent >Metallic bonding > simple molecular

Question 4

Describe the trend in Electrical Conductivity

Answer 4

Question 5

Reactions with oxygen in Period 3
| color flame and colour of products

Answer 5

Question 6

Reactions with Chlorine
| Products

Answer 6

Question 7

Reaction of Sodium with water

Answer 7

Question 8

Reaction of Magnesium with water
| water and steam

Answer 8

Question 9

Reaction of Sodium and Magnesium oxides with water

Answer 9

Question 10

Reactions of aluminium and Silicon oxides with water

Answer 10

Question 11

Reactions of Phosphorus and Sulphur oxides with water

Answer 11

Question 12

Describe the trend in electronegativity the nature of the oxide and character across period 3

Answer 12

Question 13

State the equations between Aluminium Oxide HCl and Aqueous NaOH

Answer 13

Question 14

State the Reaction of Silicon Dioxide , NaOH and with CaO

Answer 14

Question 15

State the reaction of Sulphur Dioxide with NAaOH and Sulphur trioxide with water

Answer 15

Question 16

State the equation for the reaction of NaCl and water
| Explain why

Answer 16

Question 17

State and explain the reaction for Magnesium Chloride and Water

Answer 17

Question 18

State and explain the reaction between Aluminium Chloride and Water

Answer 18

Question 19

State and explain the reaction between Silicon Tetrachloride and water

Answer 19

Question 20

State and Explain the reaction between Phosphorus Pentachloride and Water

Answer 20