Explanation: 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.
Which element has a larger ionic radius?
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.
How do you determine the largest ionic radius?
In general:
- Ionic radius increases as you move from top to bottom on the periodic table.
- Ionic radius decreases as you move across the periodic table, from left to right.
6 февр. 2020 г.
Which of the following ions has largest radius?
Here, Mg+2 will have largest ionic radius.
What is the ionic radius of Mg2+?
Metallic, Covalent and Ionic Radii(r)*
| Atom/Ion | r(pm) |
|---|---|
| Mg | 160 |
| Mg2+ | 72 |
| Mn | 137 |
| Mn2+ | 70 |
Why is Fe2+ bigger than Fe3+?
Fe2+ will be larger than Fe3+. This is because the outermost electron in the Fe2+ ion is pulled off to form Fe3+ ion. As the electrons are removed, it reduces the repulsion increasing nuclear charge experienced by each of the other d electrons and decreases the size of the ion.
Do you predict that the ionic radius of Sr2+ is larger or smaller in size than the ionic radius of Mg2+?
Hence, from the electronic configuration of Mg2+ ( [He]) and that of Sr2+ ([Kr]), the Sr^2+ ion is much larger and has many more intervening shells than Mg2+. Hence it follows that as we move down group 2, we expect that the ionic radius should increase in accordance with the reason given above.
Which ion has smallest radius?
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.
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Ionic Radii and Isoelectronic Series.
| Ion | Radius (pm) | Atomic Number |
|---|---|---|
| N 3− | 146 | 7 |
| O 2− | 140 | 8 |
| F − | 133 | 9 |
| Na + | 98 | 11 |
Which ion has the largest radius Se2 F O2 Rb+?
Answer. Answer: The answer is “Rubidium Rb+”.
Which has the largest ionic radius S2 Cl K+ Ca2+?
The correct option is : d S2-Explanation:Since all of these ions contain 18 electrons each so these are isoelectronic. For isoelectronic ions smaller the positive nuclear charge greater is the size of the ion.
Which ion has the smallest radius quizlet?
S2-, K+, and Ca2+ all have 18 electrons. Which ion would you expect to have the smallest ionic radius? Ca2+ would have the smallest ionic radius because Calcium has a positive charge, and because this ion is a cation, cations will have the smallest radius.
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.
Is Na+ or mg2+ bigger?
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 bigger Se2 or Br?
The Br− ion is smaller than the Se2− ion because the Br− ion has a larger nuclear charge and more extra electrons than the Se2− ion.