Questions on Ionic Bond
Multiple-Choice Questions: Ionic Bond
1. What is an ionic bond?
A) Sharing of electrons between two atoms
B) Transfer of neutrons from one atom to another
C) Transfer of electrons from one atom to another
D) Mutual sharing of protons
E) Overlapping of orbitals
2. Which elements typically form ionic bonds?
A) Nonmetals with nonmetals
B) Metals with nonmetals
C) Metalloids only
D) Noble gases
E) Metals with noble gases
3. What happens to electrons during the formation of an ionic bond?
A) They are shared equally between atoms
B) They are transferred from a metal to a nonmetal
C) They are gained by both atoms
D) They remain unchanged
E) They are transferred from a nonmetal to a metal
4. Which of the following compounds contains an ionic bond?
A) CO₂
B) NH₃
C) NaCl
D) H₂O
E) O₂
5. What is formed when an atom loses one or more electrons?
A) An anion
B) A proton
C) A neutron
D) A cation
E) A molecule
6. Which of the following is a property of ionic compounds?
A) Low melting points
B) Poor electrical conductivity when molten
C) Soluble in nonpolar solvents
D) Conduct electricity when dissolved in water
E) Exist as soft powders
7. Which pair of atoms is most likely to form an ionic bond?
A) Cl and Br
B) C and O
C) Na and Cl
D) H and O
E) N and F
8. Anions are:
A) Neutral atoms
B) Positively charged ions
C) Negatively charged ions
D) Molecules
E) Protons
9. Cations are typically formed by:
A) Nonmetals
B) Metals
C) Noble gases
D) Metalloids
E) Halogens
10. In the compound MgCl₂, magnesium has a charge of:
A) +1
B) –2
C) +2
D) –1
E) 0
11. Which of these elements forms a 1– anion?
A) Na
B) Mg
C) F
D) Al
E) Ca
12. Which of the following is a diatomic molecule and not ionic?
A) NaCl
B) CaF₂
C) O₂
D) KBr
E) MgO
13. Ionic compounds typically exist as:
A) Individual molecules
B) Gaseous atoms
C) Crystalline solids
D) Discrete covalent bonds
E) Polymers
14. What type of structure do ionic compounds form?
A) Linear
B) Amorphous
C) Crystal lattice
D) Metallic cloud
E) Gas bubbles
15. Which of the following ions has the same electron configuration as neon (Ne)?
A) Na⁺
B) F⁻
C) O²⁻
D) All of the above
E) Only A and C
16. What is the correct formula for calcium bromide?
A) CaBr
B) CaBr₂
C) Ca₂Br
D) Ca₂Br₃
E) CaBr₃
17. What is the total charge of an ionic compound?
A) Positive
B) Negative
C) Depends on the anion
D) Always zero
E) Depends on the cation
18. Which of these compounds has a 1:1 ratio of ions?
A) NaCl
B) MgCl₂
C) Al₂O₃
D) CaF₂
E) Na₂O
19. Which factor increases the strength of an ionic bond?
A) Larger ion size
B) Higher charges on the ions
C) Higher temperature
D) Greater atomic mass
E) Presence of polar bonds
20. The high melting points of ionic compounds are due to:
A) Weak dispersion forces
B) Strong covalent bonds
C) Strong electrostatic attraction
D) Molecular interactions
E) Hydrogen bonding
21. Which compound is formed by the transfer of electrons?
A) CO₂
B) CH₄
C) NaF
D) NH₃
E) H₂
22. Which of the following formulas represents an ionic compound?
A) H₂O
B) CCl₄
C) K₂O
D) SO₂
E) O₂
23. Which of these substances is an example of an ionic solid?
A) Sugar
B) Graphite
C) Table salt (NaCl)
D) Diamond
E) Water ice
24. Which property is not typical of ionic compounds?
A) High boiling points
B) Good conductor as solid
C) Soluble in water
D) Hard and brittle
E) Conducts when molten
25. Which of the following elements can form +2 cations?
A) Sodium
B) Calcium
C) Potassium
D) Aluminum
E) Fluorine
26. What is the correct name for AlCl₃?
A) Aluminum(III) chloride
B) Aluminum trichloride
C) Aluminum chloride
D) Monoaluminum trichloride
E) Tri-aluminum chloride
27. Which of the following elements forms a stable anion by gaining one electron?
A) Na
B) Cl
C) Mg
D) Ca
E) Al
28. What is the formula of the ionic compound formed between magnesium and oxygen?
A) MgO
B) Mg₂O
C) MgO₂
D) Mg₂O₃
E) Mg₃O₂
29. The electron configuration of Na⁺ is the same as that of:
A) Na
B) Cl
C) Ne
D) Mg
E) Ar
30. What is a key difference between covalent and ionic bonds?
A) Ionic bonds involve shared electrons
B) Covalent bonds involve metal atoms
C) Ionic bonds involve electron transfer
D) Covalent bonds form ions
E) Ionic bonds are formed by noble gases
Answers with Explanations
1. C) Transfer of electrons from one atom to another
2. B) Metals with nonmetals — form ionic compounds
3. B) They are transferred from a metal to a nonmetal
4. C) NaCl — classic ionic compound
5. D) A cation — positively charged ion
6. D) Conduct electricity when dissolved in water
7. C) Na and Cl — forms NaCl, an ionic bond
8. C) Negatively charged ions
9. B) Metals — tend to lose electrons
10. C) +2 — Mg forms Mg²⁺
11. C) F — gains one electron to form F⁻
12. C) O₂ — covalent, not ionic
13. C) Crystalline solids
14. C) Crystal lattice — 3D arrangement
15. D) All of the above — Na⁺, F⁻, O²⁻ all have 10 electrons like Ne
16. B) CaBr₂ — Ca²⁺ needs two Br⁻ to balance
17. D) Always zero — neutral compounds
18. A) NaCl — one Na⁺ and one Cl⁻
19. B) Higher charges on the ions — stronger attraction
20. C) Strong electrostatic attraction
21. C) NaF — electron transfer from Na to F
22. C) K₂O — potassium oxide
23. C) Table salt (NaCl) — ionic solid
24. B) Good conductor as solid — ionic solids conduct when molten or in solution, not as solids
25. B) Calcium — forms Ca²⁺
26. C) Aluminum chloride — standard IUPAC name
27. B) Cl — gains one electron to form Cl⁻
28. A) MgO — Mg²⁺ + O²⁻
29. C) Ne — Na⁺ has same configuration
30. C) Ionic bonds involve electron transfer
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