1. What is the primary difference between ionic and covalent bonds?
A. Ionic bonds involve the sharing of electrons, while covalent bonds involve the transfer of electrons
B. Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons
C. Ionic bonds only occur between metals, while covalent bonds only occur between nonmetals
D. Ionic bonds are always weaker than covalent bonds
2. Which type of elements typically form ionic bonds?
A. Two nonmetals
B. Two metals
C. A metal and a nonmetal
D. Only noble gases
3. In a covalent bond, what happens to the electrons?
A. They are completely transferred from one atom to another
B. They are shared between atoms
C. They are destroyed
D. They become neutrons
4. Which of the following compounds is most likely ionic?
A. NaCl
B. CO2
C. H2O
D. CH4
5. What type of bond is typically formed between two nonmetal atoms?
A. Metallic bond
B. Hydrogen bond
C. Ionic bond
D. Covalent bond
6. Which statement about electronegativity in ionic bonds is correct?
A. The electronegativity difference must be less than 0.4
B. The electronegativity difference must be greater than 1.7
C. Electronegativity doesn't affect ionic bonding
D. Both atoms must have the same electronegativity
7. What is a characteristic of covalent compounds?
A. They typically have high melting points
B. They are good conductors of electricity in solid form
C. They typically exist as gases or liquids at room temperature
D. They always form crystalline structures
8. In an ionic compound, what is the overall charge?
A. Positive
B. Negative
C. Neutral
D. Variable
9. Which of the following is a property of ionic compounds?
A. Low melting point
B. High solubility in water
C. Poor electrical conductivity in all states
D. Exist primarily as gases
10. What determines the strength of a covalent bond?
A. The number of shared electron pairs
B. The atomic mass of the atoms
C. The color of the compound
D. The phase of matter
11. Which type of bond typically results in the formation of molecules?
A. Metallic bonds
B. Ionic bonds
C. Covalent bonds
D. Van der Waals forces
12. What is the primary driving force for ionic bond formation?
A. Electron sharing
B. Electrostatic attraction
C. Nuclear fusion
D. Van der Waals forces
13. In a polar covalent bond, what occurs?
A. Electrons are shared equally
B. Electrons are transferred completely
C. Electrons are shared unequally
D. No electrons are involved
14. Which compound would most likely have covalent bonds?
A. KBr
B. N2
C. CaO
D. MgCl2
15. What determines whether a bond will be ionic or covalent?
A. The temperature of the reaction
B. The pressure during formation
C. The electronegativity difference between atoms
D. The atomic numbers of the elements
16. How are electrons arranged in a double covalent bond?
A. One electron is shared
B. Two pairs of electrons are shared
C. Three pairs of electrons are shared
D. Four pairs of electrons are shared
17. Which best describes the electron arrangement in NaCl?
A. Electrons are equally shared
B. Na completely loses an electron to Cl
C. Cl completely loses an electron to Na
D. No electron transfer occurs
18. What type of structure do most ionic compounds form?
A. Individual molecules
B. Crystalline lattices
C. Amorphous solids
D. Linear chains
19. In which state do ionic compounds typically conduct electricity?
A. Only in solid state
B. In aqueous solution or molten state
C. Only in gaseous state
D. Never conduct electricity
20. What is a characteristic of covalent bonds?
A. They only form between metals
B. They involve complete electron transfer
C. They are directional in nature
D. They always form ionic crystals
ANSWER KEY
11. C
1. B
12. B
2. C
13. C
3. B
14. B
4. A
15. C
5. D
16. B
6. B
17. B
7. C
18. B
8. C
19. B
9. B
20. C
10. A