Question 71 : The less the electronegativity differences between two bonded atoms, the greater the _____.
1. ionic character
2. polar character
3. covalent character
4. metallic character
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Question 72 : Once formed, how are coordinate covalent bonds different from other covalent bonds?
1. They are more ionic in character.
2. There is no difference.
3. They are stronger.
4. They are weaker.
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Question 73 : A molecule with a single covalent bond is ____.
1. CO
2. CO₂
3. Cl₂
4. N₂
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Question 74 : Which of the following diatomic molecules is joined by a double covalent bond?
1. Cl₂
2. N₂
3. O₂
4. He₂
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Question 75 : Which of the following elements can form diatomic molecules held together by triple covalent bonds?
1. nitrogen
2. fluorine
3. carbon
4. oxygen
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Question 76 : Which of the following is the name given to the pairs of valence electrons that do not participate in bonding in diatomic oxygen molecules?
1. unvalenced pair
2. outer pair
3. unshared pair
4. inner pair
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Question 77 : Why do atoms share electrons in covalent bonds?
1. to become more polar
2. to attain a noble-gas electron configuration
3. to increase their atomic numbers
4. to become ions and attract each other
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