# Question: Why Do Anions Have A Larger Radius?

## Which is larger fe2+ or fe3+?

Fe2+ is greater in size than Fe3+.

Fe3+ ionic radius is 63 pm, while Fe2+ has an ionic radius of 77 pm.

(For comparison, the Fe atom has a radius of 140 pm).

This is because the outermost electron in the Fe2+ ion is pulled off to form Fe3+ ion..

## Which has the largest radius mg Si S or Na?

Which has the largest atomic radius: magnesium (Mg), silicon (Si), sulfur (S), or sodium (Na)? … sodium (Na) has the largest radius.

## Why is the ionic radius of K+ smaller than CL?

In other words, K+ has bigger effective nuclear charge than Cl− , which translates to a bigger net positive charge felt by the outermost electrons. This will compress the energy levels a bit and make the ionic radius smaller for the potassium cation. Therefore, the chloride anion will have the larger atomic radius.

## Why is atomic radius of argon larger than chlorine?

The size of argon is greater than chlorine because of the interelectronic repulsions start taking place when an atom attain its octet.

## How do you know which ion has the largest radius?

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.

## Why does na have a larger radius than Li?

Explanation: The number of energy levels increases as you move down a group. … This means that its valence electron is in the second energy level. Sodium is in period 3 in group 1/IA, so its valence electron is in the third energy level, therefore it has a greater atomic radius than lithium.

## Which has a larger atomic radius Na or Na 1?

Yes Na+ is smaller than Na. When one electron is removed from the valence shell there are 11 protons but 10 electrons. This means that the nucleus can now pull each electron with a greater force than before. Due to this the electrons come closer and and the size of Na+ reduces.

## 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 has a larger atomic radius O or o2?

O2− is larger than O because the increase in electron repulsions that accompany addition of an electron causes the electron cloud to expand. O2− is larger than O because O is neutral but O2− has a charge 2−.

## Is argon bigger than chlorine?

Argon is bigger than chlorine because argon being inert it’s outermost shell is completely filled thus a force of repulsion acts between the outermost electron and the nucleus causing it to grow bigger in size than chlorine.

## Which has a larger radius S or CL?

Which ion has the larger atomic radius: S= or Cl-? In general, both have the same electrons (repulsing each other the same amount), but the Cl Chlorine has more protons which would attract more. So, the general answer is the Cl will become a tighter configuration in 3D.

## Why do anions get bigger?

In general, anions are larger than the corresponding neutral atom, since adding electrons increases the number of electron-electron repulsion interactions that take place. Cations are smaller than the corresponding neutral atoms, since the valence electrons, which are furthest away from the nucleus, are lost.

## How a small ion can have a larger radius?

If electrons are added to the atom, the ion becomes larger. The ionic radius for an atom is measured in a crystal lattice , requiring a solid form for the compound. … When the valence electron(s) are removed, the resulting ion has one fewer occupied principal energy level, so the electron cloud that remains is smaller.

## Why the atomic radius of argon is larger than all the member of third period?

This is because the number of protons increases (sodium has 11, argon has 18) so the nuclear charge increases. … The electrons that are added from sodium to argon are all added into the same outer shell, so there is no difference in shielding.

## Which is smaller in size Cl or Ar?

Chlorine is smaller than Argon.