Why do ionic compounds have such high melting and boiling points?

The electrostatic forces of attraction between the positive and negative ions holding the lattice together are very strong and a lot of energy is required to break them apart.

The electrostatic forces of attraction between the positive ions holding the lattice together are very strong and a lot of energy is required to break them apart.

The electrostatic forces of attraction between the positive and electrons holding the lattice together are very strong and a lot of energy is required to break them apart.

The electrostatic forces of attraction between the cations and anions holding the lattice together are very weak and a less energy is required to break them apart.

Why are ionic compounds brittle (shattered) when it is hit with a hammer?

When hit with a hammer, the like-charged ions line up together and they repel due to electrostatic repulsion and this causes the ionic compound to shatter.

When hit with a hammer, the like-charged ions line up together and they draw closer together due to electrostatic attraction and this causes the ionic compound to shatter.

When hit with a hammer, the opposite-charged ions line up together and they attract due to electrostatic forces and this causes the ionic compound to shatter.

When hit with a hammer, the cations disperse and they repel due to electrostatic repulsion and this causes the ionic compound to shatter.

Indicate whether the following atoms will form cations and explain why.

Calcium. Reason - metal forms cation as it tends to lose electrons.

Flourine. Reason- metal forms cation as it tends to lose electrons.

Calcium. Reason - non-metal forms cation as it tends to gain electrons

Flourine. Reason - non-metal forms cation as it tends to lose electrons.

These all are the characteristics of ionic compounds except

conduct electricity when dissolved in water

high melting and boiling points

Properties Of Ionic Compounds Trivia Quiz

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Properties Of Ionic Compounds Trivia Quiz - Quiz

Do you have enough knowledge about ionic compounds and their properties? If yes, play this trivia quiz and prove it to us. An ionic compound in chemistry is a chemical compound made up of ions (cations and anions) that are held by electrostatic forces, commonly known as ionic bonding. Here, we have asked some questions related to those bonds. So, if you think you can easily answer the questions asked here. Take the quiz now. All the best, buddy!

Questions and Answers

1.

Why do ionic compounds have such high melting and boiling points?
- A.
  
  The electrostatic forces of attraction between the positive and negative ions holding the lattice together are very strong and a lot of energy is required to break them apart.
- B.
  
  The electrostatic forces of attraction between the positive ions holding the lattice together are very strong and a lot of energy is required to break them apart.
- C.
  
  The electrostatic forces of attraction between the positive and electrons holding the lattice together are very strong and a lot of energy is required to break them apart.
- D.
  
  The electrostatic forces of attraction between the cations and anions holding the lattice together are very weak and a less energy is required to break them apart.
Correct Answer
A. The electrostatic forces of attraction between the positive and negative ions holding the lattice together are very strong and a lot of energy is required to break them apart.

Explanation
Ionic compounds have high melting and boiling points because of the strong electrostatic forces of attraction between the positive and negative ions holding the lattice together. These forces are very strong, requiring a lot of energy to break them apart. This is why ionic compounds have high melting and boiling points.

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2.

Why are ionic compounds brittle (shattered) when it is hit with a hammer?
- A.
  
  When hit with a hammer, the like-charged ions line up together and they draw closer together due to electrostatic attraction and this causes the ionic compound to shatter.
- B.
  
  When hit with a hammer, the opposite-charged ions line up together and they attract due to electrostatic forces and this causes the ionic compound to shatter.
- C.
  
  When hit with a hammer, the like-charged ions line up together and they repel due to electrostatic repulsion and this causes the ionic compound to shatter.
- D.
  
  When hit with a hammer, the cations disperse and they repel due to electrostatic repulsion and this causes the ionic compound to shatter.
Correct Answer
C. When hit with a hammer, the like-charged ions line up together and they repel due to electrostatic repulsion and this causes the ionic compound to shatter.

Explanation
When ionic compounds are hit with a hammer, the like-charged ions line up together and they repel due to electrostatic repulsion. This repulsion causes the crystal lattice structure of the ionic compound to break apart, resulting in the compound shattering.

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3.

Indicate whether the following atoms will form cations and explain why.
- A.
  
  Flourine. Reason- metal forms cation as it tends to lose electrons.
- B.
  
  Calcium. Reason - non-metal forms cation as it tends to gain electrons
- C.
  
  Flourine. Reason - non-metal forms cation as it tends to lose electrons.
- D.
  
  Calcium. Reason - metal forms cation as it tends to lose electrons.
Correct Answer
D. Calcium. Reason - metal forms cation as it tends to lose electrons.

Explanation
The correct answer is Calcium. Calcium is a metal and metals tend to lose electrons to form cations. When calcium loses two electrons, it forms a calcium ion with a +2 charge. This is because metals have fewer valence electrons and a lower electronegativity, making it easier for them to lose electrons and form positive ions.

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4.

Determine the formula of the ionic compound formed when the following react. Magnesium and oxygen atoms
- A.
  
  MgO₂
- B.
  
  CaO₂
- C.
  
  MgO
- D.
  
  CaO
Correct Answer
C. MgO

Explanation
When magnesium reacts with oxygen, it forms an ionic compound called magnesium oxide (MgO). Magnesium loses two electrons to become Mg2+ ion, while oxygen gains two electrons to become O2- ion. The resulting compound has a 1:1 ratio of magnesium ions to oxide ions, giving the formula MgO.

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5.

When the ions in each pair combine to form ionic compounds, what will be the ratio of metal ion to non-metal ion? Mg²⁺ and Cl^-
- A.
  
  2 Mg ²⁺: 1 Cl^-
- B.
  
  1 Mg ²⁺: 2 Cl^-
- C.
  
  2 Mg ²⁺: 3 Cl^-
- D.
  
  1 Mg ²⁺: 1 Cl^-
Correct Answer
B. 1 Mg ²⁺: 2 Cl^-

Explanation
The ratio of metal ion to non-metal ion in the ionic compound formed by Mg2+ and Cl- is 1:2. This means that for every 1 Mg2+ ion, there are 2 Cl- ions present in the compound.

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6.

Name the ionic compound with the empirical formula: K₂O
- A.
  
  Calcium oxide
- B.
  
  Potassium oxide
- C.
  
  Sodium oxide
- D.
  
  Barium oxide
Correct Answer
B. Potassium oxide

Explanation
The correct answer is Potassium oxide. Potassium oxide has the empirical formula K2O, which means it consists of two potassium ions (K+) and one oxygen ion (O2-). Calcium oxide (CaO), sodium oxide (Na2O), and barium oxide (BaO) do not match the given empirical formula.

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7.

Select the formula for the following ionic compound, Aluminium Sulphide Hint: Cross mutliply (Al³⁺), (S^2-)
- A.
  
  AlS
- B.
  
  Al₂S
- C.
  
  AlS₃
- D.
  
  Al₂S₃
Correct Answer
D. Al₂S₃

Explanation
The formula for an ionic compound is determined by the charges of the ions involved. In this case, Aluminium has a charge of 3+ (Al3+) and Sulphide has a charge of 2- (S2-). In order to balance the charges, the subscripts of the elements in the formula must be such that the total positive charge equals the total negative charge. Since Aluminium has a charge of 3+ and Sulphide has a charge of 2-, it would take two Sulphide ions to balance out the charge of one Aluminium ion. Therefore, the correct formula for Aluminium Sulphide is Al2S3.

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8.

In what form ionic compounds conduct electricity?
- A.
  
  As a solid
- B.
  
  As a liquid
- C.
  
  When dissolved in water
- D.
  
  When warmed slightly
Correct Answer
C. When dissolved in water

Explanation
Ionic compounds conduct electricity when dissolved in water because in their solid form, the ions are held tightly in a lattice structure and are not free to move. However, when the ionic compound is dissolved in water, the water molecules surround the ions, separating them from each other and allowing them to move freely. The ions then become mobile and can carry an electric charge, enabling the solution to conduct electricity.

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9.

These all are the characteristics of ionic compounds except
- A.
  
  Soft
- B.
  
  Conduct electricity when dissolved in water
- C.
  
  High melting and boiling points
- D.
  
  Crystal lattice structure
Correct Answer
A. Soft

Explanation
Ionic compounds are typically characterized by their high melting and boiling points, crystal lattice structure, and ability to conduct electricity when dissolved in water. However, they are not known for being soft. Ionic compounds are usually hard and brittle due to the strong electrostatic forces between the positive and negative ions in their lattice structure. Therefore, the correct answer is "soft".

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10.

When ions bond, they form a repeating three- dimensional pattern called ______.
- A.
  
  A chemical compound
- B.
  
  An ionic chalice
- C.
  
  A crystal lattice
- D.
  
  An ionic bond
Correct Answer
C. A crystal lattice

Explanation
When ions bond, they form a repeating three-dimensional pattern called a crystal lattice. This lattice structure is formed due to the strong electrostatic forces of attraction between the positively and negatively charged ions. The ions arrange themselves in a regular pattern, creating a solid crystal with a repeating unit cell. This arrangement allows for the stability and strength of the ionic bond between the ions.

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Properties Of Ionic Compounds Trivia Quiz

Why do ionic compounds have such high melting and boiling points?

Why are ionic compounds brittle (shattered) when it is hit with a hammer?

Indicate whether the following atoms will form cations and explain why.

Determine the formula of the ionic compound formed when the following react. Magnesium and oxygen atoms

When the ions in each pair combine to form ionic compounds, what will be the ratio of metal ion to non-metal ion? Mg2+ and Cl-

Name the ionic compound with the empirical formula: K2O

Select the formula for the following ionic compound, Aluminium Sulphide Hint: Cross mutliply (Al3+), (S2-)

In what form ionic compounds conduct electricity?

These all are the characteristics of ionic compounds except

When ions bond, they form a repeating three- dimensional pattern called ______.

When the ions in each pair combine to form ionic compounds, what will be the ratio of metal ion to non-metal ion? Mg²⁺ and Cl^-

Name the ionic compound with the empirical formula: K₂O

Select the formula for the following ionic compound, Aluminium Sulphide Hint: Cross mutliply (Al³⁺), (S^2-)