name the first element of group 16,17,18
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oxygen (O), sulphur (S), selenium (Se), tellurium (Te) and polonium (Po). Group 17 elements are the halogens which includes fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Group 18 elements includes Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
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pg no 138 SATE BOARD 12TH CHEMISTRY LS NO 7
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