Chemistry

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Which of the following groups has the species listed correctly in order of increasing radius?

1. Mg +2, Ca +2, Ba +2
2. Fe, Fe +2, Fe +3
3. Na, Mg, Al
4. Br-, Cl-, F-
5. K+, Na+, Li+

Is it 1. Mg +2, Ca +2, Ba +2 ?

  • Chemistry -

    yes

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