Topic 32- Period 3 properties

Question 1

Reaction of metal with water + metal with steam

Answer 1

Metal + water —> Metal hydroxide + Hydrogen
Metal + Steam —> Metal oxide + Hydrogen

Question 2

Which reacts more quickly with water- Magnesium or sodium

Answer 2

Sodium

Question 3

Formula of Silicon oxide

Answer 3

SiO2

Question 4

Formula of oxide for phosphorus

Answer 4

P4O10

Question 5

Formula of sulfur oxide

Answer 5

SO2

Question 6

Order of melting points (High to low) Period 3

Answer 6

Silicon
Aluminium
Magnesium
Sulfur
Sodium
Phosphorus

Question 7

Each metal and strength of reaction in air group 3

Answer 7

Magnesium- Vigourous
Sodium- Vigourous
Aluminium- Slow
Silicon- Slow
Phosphorus- Spontaneous combustion
Sulfur- Burns steadily

Question 8

Reaction of metal oxide and water

Answer 8

Metal oxide + Water –> Metal hydroxide

Question 9

Non metal oxides reacting with water eqn

Answer 9

Question 10

Metal Oxide and acid general equation

Answer 10

Metal oxide + Acid —–> Salt +Water

Question 11

The reactions of non-metal oxides with bases

Answer 11

SiO2 + 2NaOH —> Na2SiO3 + H2O
P4O10 + 12NaOH —> 4Na3PO4 + 6H2O
SO2 + 2NaOH –> Na2SO3 + H2O
SO3 + 2NaOH —> Na2SO4 + H20

Question 12

The reaction of aluminium oxide with acid and with a base

Answer 12

Al2O3 + 3H2SO4 —> Al2(SO4)3 + 3H2O
Al2O3 + 2NaOH + 3H2O —> 2NaAl(OH)4

Question 13

Why is magnesium hydroxide less alkaline than sodium hydroxide?

Answer 13

Because it is less soluble in water

Question 14

Draw graph of first ionisation energies in P3

Answer 14

Question 15

Which element has highest second ionisation energy in period 3

Answer 15

Sodium

Question 16

Structure of H2So3

Answer 16

Question 17

Draw structure of phosphoric acid

Answer 17