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1.Rank these elements according to atomic radius.

Ca Sr Rb Cs Mg

2.Rank the following ions from largest to smallest.(Radius)

Mo6+ Se2- Rb+ Br- Y3+

3.Rank these elements according to first ionization energy.

O F Ne Li C Be

4. Rank these elements according to electron affinity.

Ge F He

5.Using only a periodic table as a guide, arrange the following atoms in order of decreasing electronegativity.

Si Na F S O

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