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Periodic Table - Periodicity

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60 questions

Jul 7, 2025

Question 1

What is the reaction of sodium with oxygen?

Answer

2Na (s) + O (g) → 2NaO (s)

Question 2

What is produced when magnesium reacts with oxygen?

Answer

2MgO (s)

Question 3

What is the flame color produced by the reaction of aluminum with oxygen?

Answer

Bright white

Question 4

What type of reaction occurs when silicon reacts with oxygen?

Answer

Slow

Question 5

What is the product of the reaction of phosphorus with oxygen?

Answer

PO (s)

Question 6

What is the reaction condition for sulfur reacting with oxygen?

Answer

Powdered S, Heat

Question 7

What is the reaction of sodium with chlorine?

Answer

2Na (s) + Cl (g) → 2NaCl (s)

Question 8

What is produced when magnesium reacts with chlorine?

Answer

MgCl (s)

Question 9

What is the reaction condition for aluminum reacting with chlorine?

Answer

Heat

Question 10

What is the product of the reaction of phosphorus with chlorine?

Answer

2PCl (l)

Question 11

What happens when sodium reacts with cold water?

Answer

It fizzes and forms sodium hydroxide.

Question 12

What is the pH of the solution formed when sodium reacts with cold water?

Answer

pH 14

Question 13

What is the reaction of magnesium with cold water?

Answer

Mg (s) + 2HO (l) → Mg(OH)(aq) + H(g)

Question 14

What is the pH of the solution formed when magnesium reacts with cold water?

Answer

pH 11

Question 15

What occurs when magnesium is heated with steam?

Answer

It reacts vigorously to form magnesium oxide and hydrogen gas.

Question 16

What is the oxidation state of chlorine in Period 3 chlorides?

Answer

-1

Question 17

What is the oxidation state of oxygen in Period 3 oxides?

Answer

-2

Question 18

What is the oxidation number of sodium in NaO?

Answer

Question 19

What is the oxidation number of aluminum in AlO?

Answer

Question 20

What is the oxidation number of phosphorus in PO?

Answer

Question 21

What is the reaction of sodium oxide with water?

Answer

NaO (s) + HO (l) → 2NaOH (aq)

Question 22

What is the pH of the solution formed when sodium oxide reacts with water?

Answer

12 - 14

Question 23

What is the reaction of magnesium oxide with water?

Answer

MgO (s) + HO (l) → Mg(OH)(aq)

Question 24

What is the pH of the solution formed when magnesium oxide reacts with water?

Answer

8 - 10

Question 25

What is the behavior of aluminum oxide in water?

Answer

No reaction, it is insoluble.

Question 26

What is the reaction of phosphorus pentoxide with water?

Answer

P2O5 (s) + 6HO (l) → 4HPO (aq)

Question 27

What is the reaction of sulfur dioxide with water?

Answer

SO2 (g) + HO (l) ⇌ HSO (aq)

Question 28

What is the acid/base behavior of sodium oxide?

Answer

Basic

Question 29

What is the acid/base behavior of magnesium oxide?

Answer

Basic

Question 30

What is the acid/base behavior of aluminum oxide?

Answer

Amphoteric

Question 31

What is the acid/base behavior of silicon dioxide?

Answer

Acidic

Question 32

What is the acid/base behavior of phosphorus pentoxide?

Answer

Acidic

Question 33

What is the acid/base behavior of sulfur dioxide?

Answer

Acidic

Question 34

What is the bonding type of sodium chloride?

Answer

Ionic

Question 35

What is the bonding type of magnesium chloride?

Answer

Ionic

Question 36

What is the bonding type of aluminum chloride?

Answer

Covalent

Question 37

What is the bonding type of silicon chloride?

Answer

Covalent

Question 38

What is the bonding type of phosphorus trichloride?

Answer

Covalent

Question 39

What is the bonding type of sulfur dichloride?

Answer

Covalent

Question 40

What is the electronegativity of sodium?

Answer

0.9

Question 41

What is the electronegativity of magnesium?

Answer

1.2

Question 42

What is the electronegativity of aluminum?

Answer

1.5

Question 43

What is the electronegativity of silicon?

Answer

1.8

Question 44

What is the electronegativity of phosphorus?

Answer

2.1

Question 45

What is the electronegativity of sulfur?

Answer

2.5

Question 46

What is the electronegativity of chlorine?

Answer

3.0

Question 47

What is the structure of sodium oxide?

Answer

Giant ionic

Question 48

What is the structure of magnesium oxide?

Answer

Giant ionic

Question 49

What is the structure of aluminum oxide?

Answer

Giant ionic with some covalent character

Question 50

What is the structure of silicon dioxide?

Answer

Giant covalent

Question 51

What is the structure of phosphorus pentoxide?

Answer

Simple molecular

Question 52

What is the structure of sulfur dioxide?

Answer

Simple molecular

Question 53

What is the reaction of sodium hydroxide with hydrochloric acid?

Answer

NaOH (aq) + HCl (aq) → NaCl (aq) + HO (l)

Question 54

What is the reaction of magnesium hydroxide with hydrochloric acid?

Answer

Mg(OH)(s) + 2HCl (aq) → MgCl(aq) + 2HO (l)

Question 55

What is the reaction of aluminum hydroxide with hydrochloric acid?

Answer

Al(OH)(s) + 3HCl (aq) → AlCl(s) + 3HO (l)

Question 56

What is the reaction of aluminum hydroxide with sodium hydroxide?

Answer

Al(OH)(s) + NaOH (aq) → NaAl(OH)(aq)

Question 57

What is the nature of sodium hydroxide?

Answer

Strong base

Question 58

What is the nature of magnesium hydroxide?

Answer

Basic

Question 59

What is the nature of aluminum hydroxide?

Answer

Amphoteric

Question 60

What is the behavior of silicon dioxide in water?

Answer

No reaction, it is insoluble.

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