Question

1. Rank the following ions in order of decreasing radius:

Be²⁺ ,Mg²⁺ ,Ca²⁺,Sr²⁺, and Ba²⁺

Use the periodic table as necessary. Rank from largest to smallest radius. To rank items as equivalent, overlap them. 

2. Rank from largest to the smallest radius. To rank items as equivalent, overlap them. Rank the following items in order of decreasing radius:

K, K⁺, and K^-.

3. The following ions contain the same number of electrons. Rank them in order of decreasing ionic radii. Rank from largest to smallest radius. To rank items as equivalent, overlap them.

Se^2-, As³⁺, Rb⁺, Y³⁺, Br^-, Sr²⁺