आधुनिक आवर्त सारणीमध्ये अल्कली धातू कोणत्या गटात आहेत?

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RRB ALP Previous Paper 19 (Held On: 30 Aug 2018 Shift 1)
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  1. दुसरा गट
  2. अठरावा गट
  3. तिसरा गट
  4. पहिला गट

Answer (Detailed Solution Below)

Option 4 : पहिला गट
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  • आवर्त सारणीतील गट 1 मूलद्रव्य अल्कली धातू म्हणून ओळखले जातात
  • त्यांच्याकडे ns1 बाह्यतम संयुजकता आहे आणि ते S-खंडातील मूलद्रव्यांशी संबंधित आहेत.
  • मजबूत आयनिक बंध तयार करण्यासाठी सर्वात बाहेरील आवरणामध्ये त्यांचे संयोजक इलेक्ट्रॉन दान करण्याची त्यांची प्रवृत्ती देखील आहे.
  • त्यात लिथियम (Li) पासून फ्रान्सियम (Fr) पर्यंतचे मूलद्रव्य आहेत.

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