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Topic 4: Chemical bonding


15. Ionic and covalent bonding: Determining formula containing both ionic and covalent
1. Which formula contains both ionic and covalent bonds?

1) MgS 2) NaBr 3) C6H12O6 4) MgSO4

2. Which compound contains atoms that are held together by ionic and covalent bonds?
1) H2O 2) SiC 3) NaNO3 4) CH4

3. Which formula contains both ionic and covalent bonds?
1) Ca(OH)2 2) HCl 3) CH3OH 4) P2O4

4. Which compound contains both ionic and covalent bonds?
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1) Ammonia 3) Methane
2) Lithium sulfate 4) Potassium chloride


5. Which compound has atoms that are held together by both ionic and covalent bonds?
3) Sodium Chloride

1) Ammonium chloride

2) Hydrogen chloride 4) Copper(II) Chloride

16. Types of bonds: Determining formula based on bond description

1. Which substance contains bonds resulting from a transfer of electrons from one atom to another?
1) CO2 2) NH3 3) KBr 4) Cl2
2. Which pair of atoms will share electrons when a bond is formed between them?
1) Ba and I 2) Br and F 3) K and Cl 4) Li and I

3. In which compound do the atoms form bonds by sharing electrons?
1) CCl4 2) Na2O 3) CaO 4) MgO

4. In which substance is the bonding between the atoms a result of equal sharing of electrons?
1) Br2 2) Na 3) CO2 4) NH3


5. In which substance is the bonding between the atoms a result of positive ions in the sea of mobile
electrons? 2) N2 3) He 4) Ni
1) C

6. The bonding in which compound a result of unequal sharing of electrons between the atoms?
1) H2S 2) H2 3) Cl2 4) NaCl

7. Which pair of atoms will form a bond when electrons are transferred from one atom to the other?
1) C and O 2) Ca and O 3) N and O 4) O and O

8. Which pair of electrons configurations belong to atoms that will share electrons when they bond
with each other? 3) 2 – 8 – 6 and 2 – 8 – 18 – 7
1) 2 – 8 – 2 and 2 – 8 – 1
2) 2 – 8 – 18 – 8 and 2 – 8 – 13 – 1 4) 2 – 8 – 5 and 2 – 8 – 18 - 8 – 1

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