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

નીચેનામાંથી કયા તત્વમાં સંયોજકતા 4 છે?

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સિલિકોન
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હિલીયમ
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બોરોન
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નિયોન
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