Question 61 : Which of the following describes an ionic compound
1. low boiling point
2. easily vaporize
3. low melting point
4. high melting point
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Question 62 : The melting points of molecular compounds are usually _____.
1. below zero
2. lower than those of ionic compounds
3. equal to those of ionic compounds
4. higher than those of ionic compound
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Question 63 : The relative numbers of atoms of each kind in any chemical compound (using atomic symbols and subscripts) is known as a _____.
1. molecular formula
2. scientific formula
3. compound formula
4. chemical formula
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Question 64 : Which of the following cannot be represented by a molecular formula?
1. a covalent compound
2. a polar compound
3. a molecular compound
4. an ionic compound
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Question 65 : Why is hydrogen bonding only possible with hydrogen
1. Hydrogen is the only atom that is the same size as an oxygen atom.
2. Hydrogen's nucleus is electron deficient when it bonds with an electronegative atom.
3. Hydrogen is the most electronegative element.
4. Hydrogen tends to form covalent bonds.
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Question 66 : Which of the following is NOT a property of a metal?
1. low electronegativity
2. low ionization energy
3. shiny
4. may be solid, liquid, or gas at room temperature
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Question 67 : Which of the following atoms acquires the most negative charge in a covalent bond with hydrogen?
1. Na
2. S
3. C
4. O
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Question 68 : Which type of bond would result in a good conductor of electricity when the substance is dissolved in an aqueous solution?
1. ionic
2. nonpolar covalent
3. metallic
4. polar covalent
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Question 69 : When H+forms a bond with H₂ O to form the hydronium ion H₃O+ , this bond is called a coordinate covalent bond because ____.
1. the electrons are equally shared
2. it forms an especially strong bond
3. both bonding electrons come from the oxygen atom
4. the oxygen no longer has eight valence electrons
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Question 70 : What causes hydrogen bonding?
1. motion of electrons
2. sharing of electron pairs
3. bonding of a covalently bonded hydrogen atom with an unshared electron pair
4. attraction between ions
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