Lithium fluoride is a compound with the chemical formula LiF. It's a solid made up of repeating Li+ and F– ions.Determine which statements are true.The Li and F ions attract each otherThe Li and F ions repel each otherA Li ion has one more electron than a neutral Li atomA Li ion has one less electron than a neutral Li atom
Question
Lithium fluoride is a compound with the chemical formula LiF. It's a solid made up of repeating Li+ and F– ions.Determine which statements are true.The Li and F ions attract each otherThe Li and F ions repel each otherA Li ion has one more electron than a neutral Li atomA Li ion has one less electron than a neutral Li atom
Solution 1
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The Li and F ions attract each other - True. In lithium fluoride, the lithium ion (Li+) and the fluoride ion (F-) are held together by ionic bonds, which are formed due to the attraction between positively and negatively charged ions.
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The Li and F ions repel each other - False. As mentioned above, the Li+ and F- ions in lithium fluoride attract each other, not repel.
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A Li ion has one more electron than a neutral Li atom - False. A lithium ion (Li+) actually has one less electron than a neutral lithium atom. This is because it has lost one electron to become positively charged.
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A Li ion has one less electron than a neutral Li atom - True. As explained above, a lithium ion (Li+) has one less electron than a neutral lithium atom because it has lost an electron to achieve a stable electron configuration.
Solution 2
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The Li and F ions attract each other - This statement is true. In lithium fluoride (LiF), lithium (Li) loses an electron to become a positively charged ion (Li+), and fluorine (F) gains an electron to become a negatively charged ion (F-). Opposite charges attract, so the Li+ and F- ions attract each other.
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The Li and F ions repel each other - This statement is false. As mentioned above, the Li+ and F- ions in LiF attract each other due to their opposite charges.
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A Li ion has one more electron than a neutral Li atom - This statement is false. A Li ion actually has one less electron than a neutral Li atom. When lithium becomes an ion (Li+), it loses an electron.
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A Li ion has one less electron than a neutral Li atom - This statement is true. As mentioned above, a Li ion (Li+) has one less electron than a neutral Li atom because it loses an electron to become positively charged.
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