क्षारीय धातुओं को आधुनिक आवर्त सारणी में किस समूह में रखा गया है?

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RRB ALP Previous Paper 19 (Held On: 30 Aug 2018 Shift 1)
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  1. दूसरे समूह
  2. अठारहवें समूह
  3. तीसरे समूह
  4. पहले समूह

Answer (Detailed Solution Below)

Option 4 : पहले समूह
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  • आवर्त सारणी में पहले समूह के तत्वों को क्षारीय धातुओं के रूप में जाना जाता है
  • उनमें ns1 बाहरी विन्यास होता है और वे एस-ब्लॉक के तत्वों से संबंधित है।
  • उनके पास मजबूत आयनिक बांड बनाने के लिए सबसे बाहरी शेल में अपने संयोजी इलेक्ट्रॉनों को दान करने की प्रबल प्रवृत्ति होती है।
  • इसमें लिथियम (Li) से लेकर फ्रैनशियम (Fr) तक के तत्व शामिल हैं।

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