Teaching DSSSB TGT Mock Test 2025 General Science Chemistry Classification of Elements and Periodicity in Properties

આધુનિક સામયિક કોષ્ટકમાં કયા બ્લોક તત્વો ઓછા ઇલેક્ટ્રોપોઝિટિવ છે?

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એસ(S) 
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પી(P)
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ડી(D)
4
એફ(F)
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