The ionic radii of cations follow the same trends as atomic radii. They increase from top to bottom and from right to left in the Periodic Table. Thus, the ion with the largest radius is closest to the lower left corner of the Periodic Table, and that is the K+ ion.

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How do you know which atom has a larger radius?

Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.


Which ion has greatest radius in the following?

=34)>Rb+(A. N. =37) electrons) ∴Se2− has largest radius.

Which of the following ions has larger ionic radius?

Hence P3− is largest among mentioned options.


Which is larger mg or mg2+?

Answer. So Mg atom will be larger as it has more electrons than Mg 2+ and thus will have larger atomic radii.


Which has a larger atomic radius S or S2?

(ii) Explain why the radius of the S2- ion is larger than the radius of the S atom. The nuclear charge is the same for both species, but the eight valence electrons in the sulfide ion experience a greater amount of electron-electron repulsion than do the six valence electrons in the neutral sulfur atom.


Which ion has the smallest radius?

As Oxygen is present at the top of the group, therefore, it has the smallest radius due to less number of shells.

Which ion has the largest radius se2 F O2 Rb+?

Answer. Answer: The answer is “Rubidium Rb+”.


Which of the following has the largest radius?

Thus O2− has a minimum z-effective thus largest radius.

Which has the largest ionic size?

Consequently, the ion with the greatest nuclear charge (Al 3 +) is the smallest, and the ion with the smallest nuclear charge (N 3−) is the largest.…Ionic Radii and Isoelectronic Series.


IonRadius (pm)Atomic Number
N 3−1467
O 2−1408
F −1339
Na +9811

What has the highest value in the ion?

Which one of the following ions has the highest value of ionic radius? This can be explained on the basis of z/e, where as z/e ratio increases, the size decreases and when z/e ratio decreases the size increases. z is atomic number and e is number of electrons. The correct option is C.


Is Br or Br bigger?

Br – will have the largest atomic size because Br- has one extra electron in its valence shell which due to its unbalanced negative charge will be repelled and hence the atomic radius of Br- will increase.

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Which is bigger Mg2+ or Na+?

mg2+ would be the smaller ion this is because each ion has the same number of electrons however mg2+ has a greater number of protons and therefore is more charge dense and the outer electrons feel a greater pull from the nucleus. …


Which is smaller Mg2+ or Al3+?

As you go from Na+ to Mg2+ to Al3+, the number of protons in the nucleus increases and so pulls the outer electrons in more and more. … The smallest ion will be the one with the largest number of protons – Al3+; the biggest, the one with the least protons – N3-.


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