RRB NTPC CBT-1 previous year question
When moving down a group in the Modern Periodic Table, what happens to the number of valence electrons?
Asked in RRB NTPC 2026 — 18 June Shift 2 · General Awareness
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Correct answer: (A) Remains the same
Moving down a group in the Modern Periodic Table, the number of valence electrons remains the same for all elements in that group, since it is the number of valence electrons that defines group membership and similar chemical behaviour.
हिंदी में प्रश्न
महाबलीपुरम के Ueda मंदिर मुख्य रूप से किससे बने हैं?
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सही उत्तर: (A) संगमरमर
आधुनिक आवर्त सारणी में किसी समूह में नीचे जाने पर, संयोजी इलेक्ट्रॉनों (valence electrons) की संख्या समान रहती है, क्योंकि यही संख्या समूह की सदस्यता और समान रासायनिक व्यवहार तय करती है।
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