Which of the halides are formed by lanthanides ?LnX2LnX3LnX4LnX6
Question
Which of the halides are formed by lanthanides ?LnX2LnX3LnX4LnX6
Solution
Lanthanides form three types of halides: LnX2, LnX3, and LnX4.
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LnX2: These are dihalides. They are formed when a lanthanide reacts with a halogen in a 1:2 ratio. For example, when lanthanum (La) reacts with chlorine (Cl), it forms LaCl2.
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LnX3: These are trihalides and are the most common type of halides formed by lanthanides. They are formed when a lanthanide reacts with a halogen in a 1:3 ratio. For example, when lanthanum (La) reacts with chlorine (Cl), it forms LaCl3.
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LnX4: These are tetrahalides. They are less common and are formed when a lanthanide reacts with a halogen in a 1:4 ratio. For example, when cerium (Ce) reacts with fluorine (F), it forms CeF4.
LnX6 type of halides are not formed by lanthanides.
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