न्यूलँड्सचा अष्टकांचा नियम या वर्गीकरणातील शेवटचे मूलद्रव्य कोणते आहे? 

This question was previously asked in
RRB ALP Previous Paper 1 (Held On: 9 Aug 2018 Shift 1)
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  1. रेडिअम
  2. थोरियम
  3. लोह
  4. ऱ्होडियम

Answer (Detailed Solution Below)

Option 2 : थोरियम
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  • न्यूलँड्सचा अष्टकांच्या नियमाद्वारे मुलद्रव्यांची मांडणी त्यांच्या अणूवस्तुमानाच्या आधारे करण्याचा प्रयत्न केला गेला आहे.
  • न्यूलँड्सचा अष्टकांच्या नियमानुसार, दिलेल्या वर्गातील प्रत्येक आठवे मूलद्रव्य हे त्या वर्गातील पहिल्या मूलद्रव्याच्या गुणधर्माशी साधर्म्य दर्शविते.
  • हे संगीताच्या अष्टकाच्या (सप्तक) गुणधर्मासारखेच आहे.
  • आठव्या मूलद्रव्याचे अणूवस्तुमान पहिल्या मूलद्रव्यासमान असेल.
  • अशाप्रकारे, न्यूलँड्सचा अष्टकांचा नियम या वर्गीकरणातील शेवटचे मूलद्रव्य थोरियम हे होते.

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