For each of the following pairs, indicate which of the two species is of large size :  a. Fe^(2+) or Fe^(3+) b. Mg^(2+) or Ca^(2+)

For each of the following pairs, indicate which of the two species is of large size :  a. Fe^(2+) or Fe^(3+) b. Mg^(2+) or Ca^(2+)
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For each of the following pairs, indicate which of the two species is of large size : a. Fe2+ or Fe3+ b. Mg2+ or Ca2+
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