Which of these ions is most likely to substitute for Ca²⁺ in the human body

Question

Quizplus · Accepted Answer

Strontium (Sr) has a similar atomic size and charge to calcium (Ca), making it a likely candidate for substitution in the human body. Lead (Pb) is also similar in size and charge to calcium, but it is toxic and not typically found in biological systems. Chlorine (Cl) and sulfur (S) have different charges and sizes compared to calcium, making them unlikely replacements. Potassium (K) has a different charge than calcium and is typically found in different types of biological molecules.

Which of These Ions Is Most Likely to Substitute for Ca2+

Which of These Ions Is Most Likely to Substitute for Ca²⁺