MCQ
Which pair of elements with the given atomic numbers is expected to have similar properties?
- ✓$40,72$
- B$20,36$
- C$10,28$
- D$11,12$
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$(I) \,CO_3^{-2}$ $(II)\, XeF_4$
$(III)\, I^-_3$ $(IV)\, NCl_3$
$(V)\, BeCl_2$
