More the nuclear charge on ion, electrons are more strongly attracted and thus size decreases. Hence, among the given ions Al3+ is the smallest ion.
Which ion is smallest in 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.
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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 is smaller F or Na+?
Na+ has smaller size than F- because both Na+ and F- have equal number of electrons i.e.10 . After losing an electron Na will have less electron cloud and more effective nuclear charge whereas F after gaining an electron will have less effective nuclear charge than the parent atom so the size increases .
Which of these ions is the smallest?
Calcium comes the last and forms the smallest ion.
Which is bigger Al3+ or mg2+?
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 same thing is true for the other set of ions as well. … The smallest ion will be the one with the largest number of protons – Al3+; the biggest, the one with the least protons – N3-.
Which is smaller 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 ion is larger Cu or Cu2+?
Cu+ is larger than Cu2+. Cu2+ has a smaller cationic radius due to stronger hold of the nucleus on the remaining 27 electrons after the loss of two as compared to Cu+ where only one electron is lost and the hold of nucleus is less.
Which is bigger Na or Na+?
Yes Na+ is smaller than Na because Na+ is formed when an electron is lost from the Na atom,Thus the effective nuclear charge increases bcz the number of protons exceeds the number of electrons . This results in bringing the valence shell a little closer to the nucleus because of a very strong nuclear pull.
Which is larger k or k+?
These are electrons with “highest energy level”. When at neutral, the potassium ion in the form of K has an electronic configuration of: … The K+ ion has its outermost electrons on the third energy level now and is size is smaller than that of K ion. Hence, K is larger than K+.
Which is bigger O2 or Na+?
From top to bottom of the periodic table ions will increase in radii. However, now left to right the radius is more of a function of the number of electrons. Mg2+ is smaller than Na+. … Similarly, O2- will be larger than F- as both have 10 electrons but Z=8 for oxygen and Z=9 for fluorine.
Which is larger F or Li+?
On gaining electrons , the size eventually increases due to increased electron-electron repulsion. Thus Anions are greater in size than Cations. So if we compare between the above , Na+ and Li+ are smaller than F- or Cl-. And among these two, Cl- is greater in size than F- , as the ionic radii increases down the group.
Is F or F bigger?
So F- is larger in size.
Which has smallest size?
Ionic size varies inversely with nuclear charge. Higher the nuclear charge, smaller the radii. Thus P5+ because of the high nuclear charge, has the smallest size.
How do you order ion sizes?
In such a series, size decreases as the nuclear charge (atomic number) of the ion increases. The atomic numbers of the ions are S (16), Cl (17), K (19), and Ca (20). Thus, the ions decrease in size in the order: S2- > Cl– > K+ > Ca2+.
Which has maximum ionic size?
Therefore, O2− is largest in size.