What determines the size of an ion in an octahedral complex?

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In summary, the radius is the distance from the center of a circle or sphere to its outer edge. To measure the radius of a circle, you can use a ruler or measuring tape to measure the distance from the center of the circle to any point on the outer edge. A sphere has a larger radius than a circle because it is a three-dimensional shape with a curved surface, while a circle is a two-dimensional shape with a flat surface. The radius of a circle is half the length of its diameter, and cannot be negative as it is a physical measurement of distance.
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An an octahedral complex with all strong field ligands, which ion has the larger radius, Fe2+ or Co2+? What are the rules for known the size of the ion with respect if its a weak or strong field ligand?
 
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The ion with the larger radius in this case would be Fe2+. The size of an ion is determined by the strength of its ligands, with stronger ligands resulting in a smaller ion and weaker ligands resulting in a larger ion. In this case, all strong field ligands in an octahedral complex would result in a smaller ion, so Fe2+ would have a larger radius compared to Co2+ with the same ligands. This is because strong field ligands cause a greater splitting of the d orbitals, resulting in a higher energy and a more compact ion. In contrast, weak field ligands do not cause as much splitting and therefore result in a larger ion.
 

1. What is the definition of radius?

The radius is the distance from the center of a circle or sphere to its outer edge.

2. How do you measure the radius of a circle?

To measure the radius of a circle, you can use a ruler or measuring tape to measure the distance from the center of the circle to any point on the outer edge.

3. Which has a larger radius, a circle or a sphere?

A sphere has a larger radius than a circle because it is a three-dimensional shape with a curved surface, while a circle is a two-dimensional shape with a flat surface.

4. How does the radius relate to the diameter of a circle?

The radius of a circle is half the length of its diameter. This means that if you know the radius, you can find the diameter by multiplying the radius by 2.

5. Can the radius of a circle be negative?

No, the radius of a circle cannot be negative. It is a physical measurement of distance, and distance cannot be negative.

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