Teaching Jharkhand (JSSC) TGT (6 to 8) Mock Test 2023-24 General Science Chemistry Classification of Elements and Periodicity in Properties

खालीलपैकी कोणत्या घटकाची व्हॅलेन्सी 4 आहे?

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सिलिकॉन
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हेलियम
3
बोरॉन
4
निऑन
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