This quiz is completed
What happens to the atomic radius across period 3 from sodium to chlorine?
It increases
It decreases
It remains the same
It fluctuates randomly
Which of the following statements about ionic radius in period 3 is correct?
The ionic radius of positive ions increases from sodium to aluminium
The ionic radius of negative ions increases from aluminium to chlorine
The ionic radius of positive ions decreases from sodium to aluminium
The ionic radius of negative ions decreases from aluminium to chlorine
Which element in period 3 has the highest melting point?
Magnesium
Silicon
Sulphur
Sodium
Why does argon have the lowest melting point in period 3?
It has strong covalent bonds
It exists as single atoms with very weak van der Waals forces
It has a giant metallic structure
It has strong ionic bonds
Which of the following elements in period 3 is a good conductor of electricity?
Silicon
Sulphur
Aluminium
Chlorine
Why does electrical conductivity increase from sodium to aluminium?
The number of delocalised electrons increases
The atomic radius decreases
The ionic radius decreases
The melting point increases
Which of the following elements in period 3 has a lower first ionisation energy than magnesium?
Sodium
Aluminium
Silicon
Phosphorus
Why is the first ionisation energy of sulfur lower than that of phosphorus?
Sulfur has more electrons shielding
Sulfur has an electron pair in a 3p orbital, causing repulsion
Sulfur has a smaller atomic radius
Sulfur has fewer protons in its nucleus
Which element in period 3 burns with a bright white flame in oxygen to produce a white solid?
Magnesium
Aluminium
Silicon
Sulphur
What is the product when sulfur burns in oxygen?
Sulfur dioxide (SO2)
Sulfuric acid (H2SO4)
Sulfur trioxide (SO3)
Sulfurous acid (H2SO3)
Which element in period 3 reacts with chlorine to form a pale yellow solid?
Sodium
Magnesium
Aluminium
Silicon
What is the product when silicon reacts with chlorine?
SiCl2
SiCl3
SiCl4
SiCl5
Which element in period 3 reacts very exothermically with cold water to produce hydrogen gas?
Sodium
Magnesium
Aluminium
Silicon
What is the product when magnesium reacts with steam?
Magnesium hydroxide (Mg(OH)2)
Magnesium oxide (MgO)
Magnesium chloride (MgCl2)
Magnesium sulfate (MgSO4)
Which period 3 oxide reacts violently with water to form phosphoric acid?
Sodium oxide (Na2O)
Magnesium oxide (MgO)
Phosphorus(V) oxide (P4O10)
Sulfur trioxide (SO3)
What is the pH of the solution formed when sodium oxide reacts with water?
7
9
12
14
Which period 3 chloride reacts with water to produce hydrogen chloride?
Sodium chloride (NaCl)
Magnesium chloride (MgCl2)
Silicon tetrachloride (SiCl4)
Phosphorus(V)chloride (PCl5)
What is the product when phosphorus(V) chloride reacts with water?
Phosphoric acid (H3PO4)
Hydrogen chloride (HCl)
Phosphorus trichloride (PCl3)
Both A and B
Which of the following elements in period 3 forms covalent bonds in its chlorides and oxides?
Sodium
Magnesium
Silicon
Aluminium
What type of bonding is present in aluminium oxide?
Covalent
Ionic
Metallic
Van der Waals
Which of the following elements in period 3 has the highest electronegativity?
Sodium
Magnesium
Chlorine
Argon
Which element in period 3 has the lowest electronegativity?
Sodium
Magnesium
Aluminium
Silicon
Which element in period 3 does not react with oxygen directly?
Sodium
Magnesium
Chlorine
Silicon
Which element in period 3 reacts spontaneously with air to form a white solid?
Sodium
Magnesium
White phosphorus
Sulfur
What is the common oxidation state of group 1 elements in period 3?
+1
+2
-1
-2
What is the oxidation state of oxygen in most compounds?
+1
+2
-1
-2
Which element in period 3 reacts slowly with cold water but burns in steam to produce magnesium oxide?
Sodium
Magnesium
Aluminium
Silicon
What is the product when sodium reacts with water?
Sodium oxide (Na2O)
Sodium hydroxide (NaOH)
Sodium chloride (NaCl)
Sodium sulfate (Na2SO4)
Which period 3 oxide is amphoteric?
Sodium oxide (Na2O)
Magnesium oxide (MgO)
Aluminium oxide (Al2O3)
Silicon dioxide (SiO2)
Which period 3 oxide reacts with water to form a strongly basic solution?
Sodium oxide (Na2O)
Magnesium oxide (MgO)
Phosphorus(V) oxide (P4O10)
Sulfur trioxide (SO3)
Which period 3 chloride reacts with water to produce hydrogen chloride gas?
Sodium chloride (NaCl)
Magnesium chloride (MgCl2)
Silicon tetrachloride (SiCl4)
Aluminium chloride (AlCl3)
What is the product when phosphorus(V) chloride reacts with water?
Phosphoric acid (H3PO4)
Hydrogen chloride (HCl)
Phosphorus trichloride (PCl3)
Both A and B
Which type of bonding is present in silicon dioxide (SiO2)?
Ionic
Covalent
Metallic
Van der Waals
Which type of bonding is present in sodium chloride (NaCl)?
Ionic
Covalent
Metallic
Van der Waals
Which element in period 3 has the highest electrical conductivity?
Sodium
Magnesium
Aluminium
Silicon
Which element in period 3 has the lowest melting point?
Sodium
Magnesium
Argon
Chlorine
Which element in period 3 is a semiconductor?
Sodium
Magnesium
Silicon
Sulfur
Which element in period 3 is a noble gas?
Sodium
Magnesium
Chlorine
Argon
Why does the first ionisation energy of aluminium decrease compared to magnesium?
Aluminium has more protons
The electron is removed from a 3p orbital, which has more shielding
Aluminium has a smaller atomic radius
Aluminium has more electrons
Which period 3 element forms a giant covalent structure?
Sodium
Magnesium
Silicon
Chlorine
Which element in period 3 reacts with chlorine to form a colourless liquid?
Sodium
Magnesium
Silicon
Phosphorus
What is the product when magnesium reacts with chlorine?
MgCl
MgCl2
Mg2Cl
Mg2Cl3
Which element in period 3 burns with a blue flame in oxygen?
Sodium
Magnesium
Sulfur
Chlorine
What is the product when aluminium burns in oxygen?
AlO
Al2O
Al2O3
AlO2
Which period 3 oxide does not react with water?
Sodium oxide (Na2O)
Magnesium oxide (MgO)
Aluminium oxide (Al2O3)
Phosphorus(V) oxide (P4O10)
What is the pH of the solution formed when sulfur dioxide reacts with water?
7
9
5 (acidic solution)
14
Which period 3 oxide has ionic bonding?
Sodium oxide (Na2O)
Silicon dioxide (SiO2)
Phosphorus(V) oxide (P4O10)
Sulfur trioxide (SO3)
Which period 3 oxide has covalent bonding?
Sodium oxide (Na2O)
Silicon dioxide (SiO2)
Magnesium oxide (MgO)
Aluminium oxide (Al2O3)