闪卡自测
What is metallic bonding?
所有闪卡
闪卡 1
问题
What is metallic bonding?
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答案
Metallic bonding is the attraction between positive metal ions and delocalised electrons.
闪卡 2
问题
What are delocalised electrons in metals?
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答案
Delocalised electrons are electrons in metals that do not belong to any particular metal atom and are free to move throughout the metal lattice.
闪卡 3
问题
Why can metals conduct electricity?
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答案
Metals can conduct electricity because they have free electrons available to move and carry charge.
闪卡 4
问题
What allows metals to be malleable and ductile?
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答案
Metals are malleable and ductile because the layers of positive ions can slide over one another.
闪卡 5
问题
True or False? Alloys are created by mixing a metal with another metal or non-metal.
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答案
True. Alloys are created by mixing a metal with another metal or non-metal.
闪卡 6
问题
Why do metals have high melting and boiling points?
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答案
Metals have high melting and boiling points because they contain many strong metallic bonds, which require a lot of heat energy to overcome.
闪卡 7
问题
Describe the structure of a metal.
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答案
Metal structures are positive metal ions arranged in a regular pattern, with a "sea" of delocalised electrons moving freely between them.
闪卡 8
问题
True or False? Metallic bonds are strong due to the attraction between negative metal ions and delocalised electrons.
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答案
False. Metallic bonds are strong due to the attraction between positive metal ions and delocalised electrons.