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化学,英文,高中题目Answer the following questions on covalent bonds:

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化学,英文,高中题目
Answer the following questions on covalent bonds:

1. Describe 2 main differences between an ionic and a covalent bond.

2. What is a polar covalent bond?
1、covalent bond has direction and saturation.on the contrary ionic hasn't.
different form conditions
2、Atomic electrons are obviously tend to non metal(不知道翻译的对不对 = =)