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The ability of an atom in a covalent bond to attract electrons to itself is called its electronegativity.The greater the difference between the electronegativities of the two atoms in the bond, the mo

A. chlorine and bromine
B. chlorine and iodine
C. fluorine and chlorine
D. fluorine and iodine

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Which of the following properties of the elements chlorine, bromine and iodine increases with increasing atomic number（）

A. Boiling temperature
Bond enthalpy
C. Electronegativity
D. First ionization energy

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Which statement can be explained by intermolecular hydrogen bonding（）

A. Butane has a higher boiling point than propane
B. Hydrogen bromide forms an acidic solution when dissolved in water
C. SiH 4 has a higher boiling point than CH 4
D. Water has a higher boiling point than CH 4

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Poverty and bad housing conditions are still_in some distant areas（）

A. in evidence
B. in trouble
C. in need
D. in mood

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What does Katherine teach at Wellesley College（）

A. History of America
B. History of Art 100
C. Art of America in 100
D. History and Art

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The ability of an atom in a covalent bond to attract electrons to itself is called its electronegativity.The greater the difference between the electronegativities of the two atoms in the bond, the mo

A. chlorine and bromine B. chlorine and iodine C. fluorine and chlorine D. fluorine and iodine

Which of the following properties of the elements chlorine, bromine and iodine increases with increasing atomic number（）

Which statement can be explained by intermolecular hydrogen bonding（）

Poverty and bad housing conditions are still_in some distant areas（）

What does Katherine teach at Wellesley College（）

A. chlorine and bromine
B. chlorine and iodine
C. fluorine and chlorine
D. fluorine and iodine