第1题
Which of the following is the type ofbond between molecules of water?
A) Ionicbond
B) Covalentbond
C) Hydrogenbond
D) Metallicbond
第8题
Which ofthe following is the type ofbond holding Na+and Cl-ions in NaCl?
A) Ionicbond
B) Covalentbond
C) Hydrogenbond
D) Metallicbond
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