EXER
1) Name the elements in the groups 15. 16. 17
and 18
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Explanation:
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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