Period 3 Elements

question

What would be observed when Sodium burns in oxygen?
answer

Yellow flame
question

What would be observed when Magnesium burns in oxygen?
answer

white flame / white light
solid / powder / smoke / ash / white fumes
question

What would be observed when Aluminium burns in oxygen?
answer

White flame
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What would be observed when Silicon burns in oxygen?
answer

White flame
White smoke
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What would be observed when Phosphorus burns in oxygen?
answer

White flame
Smoke
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What would be observed when Sulphur burns in oxygen?
answer

blue flame
fumes or misty or pungent/choking/smelly gas
question

What is the equation for the reaction that takes place when Sodium burns in oxygen?
answer

4Na + O2 -> 2Na2O
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What is the equation for the reaction that takes place when Magnesium burns in oxygen?
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2Mg + O2 -> 2MgO
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What is the equation for the reaction that takes place when Aluminium burns in oxygen?
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4Al + 3O2 -> 2Al2O3
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What is the equation for the reaction that takes place when Silicon burns in oxygen?
answer

Si + O2 -> SiO2
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What is the equation for the reaction that takes place when Phosphorus burns in oxygen?
answer

4P + 5O2 -> P4O10
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What is the equation for the reaction that takes place when Sulphur burns in oxygen?
answer

S + O2 -> SO2
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What is the bonding in Sodium oxide?
answer

Ionic
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What is the bonding in Magnesium oxide?
answer

Ionic
question

What is the bonding in Aluminium oxide?
answer

Ionic
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What is the bonding in Silicon oxide?
answer

Covalent
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What is the bonding in Phosphorus oxide?
answer

Covalent
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What is the bonding in Sulphur dioxide?
answer

Covalent
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What are the properties of Sodium?
answer

Soft, silver, shiny
Conducts electricity
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What are the properties of Magnesium?
answer

Soft, silver, shiny
Conducts electricity
question

What are the properties of Aluminium?
answer

Easily malleable, silver, shiny
Conducts electricity
question

What are the properties of Silicon?
answer

Hard, grey-blue solid
Partial conductor of electricity (check this)
question

What are the properties of Phosphorus?
answer

Red or white solid, low melting and boiling point
Doesn’t conduct electricity
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What are the properties of Sulphur?
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Yellow solid, low melting and boiling point
Doesn’t conduct electricity
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What are the properties of Chlorine?
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Green gas, low melting and boiling point
Doesn’t conduct electricity
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What are the properties of Argon?
answer

Colourless, odourless gas
Unreactive
question

What are the observations when Sodium reacts with water?
answer

Violent reaction
Hydrogen released
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What are the observations when Magnesium reacts with water?
answer

Slow reaction
Hydrogen released
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What are the observations when Magnesium reacts with steam?
answer

Fast reaction
Hydrogen released
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What are the observations when Chlorine reacts with water?
answer

Chlorine dissolves
Hydrochloric acid formed
Chloric acid formed
question

What is the equation for the reaction of Sodium with water?
answer

2Na(s) + 2H2O(l) -> 2NaOH(aq) + H2(g)
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What is the equation for the reaction of magnesium with water?
answer

Mg(s) + 2H2O(l) -> Mg(OH)2(aq) + H2(g)
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What is the equation for the reaction of magnesium with steam?
answer

Mg(s) + H2O(g) -> MgO(s) + H2(g)
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What is the equation for the reaction of Chlorine with water?
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Cl2(aq) + H2O(l) HClO(aq) + HCl(aq)
question

What are the properties of sodium oxide?
answer

White
High melting point (1548K)
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What are the properties of the magnesium oxide?
answer

White
High melting point (3125K)
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What are the properties of the Aluminium oxide?
answer

White
High melting point (2345K)
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What are the properties of the Silicon oxide?
answer

White
High melting point (1883K)
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What are the properties of the Phosphorus oxide?
answer

Low melting point (573K)
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What are the properties of the Sulphur oxide?
answer

Low melting point (200 for SO2, 290K for SO3)
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What is the structure of the sodium oxide?
answer

Giant ionic
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What is the structure of the magnesium oxide?
answer

Giant ionic
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What is the structure of the aluminium oxide?
answer

Giant ionic
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What is the structure of the silicon oxide?
answer

Giant covalent / Macromolecular
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What is the structure of the phosphorus oxide?
answer

Molecular
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What is the structure of the sulphur oxide?
answer

Molecular
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What is observed when the sodium oxide is reacted with water?
answer

Strongly alkaline solution formed
pH 13-14
question

What is observed when the magnesium oxide is reacted with water?
answer

Weakly alkaline solution formed
pH 10
question

What is observed when the aluminium oxide is reacted with water?
answer

No reaction
question

What is observed when the silicon oxide is reacted with water?
answer

No reaction
question

What is observed when the phosphorus oxide is reacted with water?
answer

Strongly acidic solution produced
pH 0-1
question

What is observed when sulphur dioxide is reacted with water?
answer

Acidic solution produced pH 2-3
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What is observed when sulphur trioxide is reacted with water?
answer

White foggy droplets of acid form pH 0-1
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What is the equation for reaction of water with the sodium oxide?
answer

Na2O + H2O -> Na+ + 2OH-
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What is the equation/s for reaction of water with the magnesium oxide?
answer

Mg + H2O -> Mg(OH)2
Mg(OH)2 -> Mg2+ + 2OH-
question

What is the equation for reaction of water with the Aluminium oxide?
answer

No reaction
question

What is the equation for reaction of water with the silicon oxide?
answer

No reaction
question

What is the equation for reaction of water with the phosphorus oxide?
answer

P4O10 + 6H2O -> 4H3PO4
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What is the equation/s for reaction of water with sulphur dioxide?
answer

SO2 + H2O -> H2SO3
H2SO3 -> H+ + HSO3-
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What is the equation/s for reaction of water with sulphur trioxide?
answer

SO3 + H2O -> H2SO4
H2SO4 -> H+ + HSO4-
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What is the equation for the reaction that occurs when sodium oxide reacts with hydrochloric acid?
answer

Na2O + 2HCl -> 2NaCl + H2O
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What is the equation for the reaction that occurs when magnesium oxide reacts with sulphuric acid?
answer

MgO + H2SO4 -> MgSO4 + H2O
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What is the equation for the reaction that occurs when aluminium oxide reacts with sulphuric acid?
answer

Al2O3 + 3H2SO4 -> Al2(SO4)3 + 3H2O
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What is the equation for the reaction that occurs when aluminium oxide reacts with hot, concentrated sodium hydroxide (and water)?
answer

Al2O3 + 2NaOH + 3H2O -; 2NaAl(OH)4
question

What is the equation for the reaction that occurs when aluminium oxide reacts with hydrochloric acid?
answer

Al2O3 + 6H+ -> 2Al3+ + 3H2O
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What is the equation for the reaction that occurs when aluminium oxide reacts with sodium hydroxide?
answer

Al2O3 + 2OH– + 3H2O -> 2Al(OH)4–
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What is the equation for the reaction that occurs when silicon oxide reacts with hot, concentrated sodium hydroxide?
answer

SiO2 + 2NaOH -; Na2SiO3 + H20
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What is the equation for the reaction that occurs when phosphorus oxide reacts with hot, concentrated sodium hydroxide?
answer

12NaOH + P4O10 -; 4Na3PO4 + 6H2O
question

What is the equation/s for the reaction that occurs when sulphur dioxide reacts with sodium hydroxide?
answer

SO2 + NaOH -> NaHSO3
NaHSO3 + NaOH -> Na2SO3 + H2O

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