1 Answer. Ernest Z. K+ has the largest radius.
Which of the following ions has largest radius?
Here, Mg+2 will have largest ionic radius.
Which elements have the largest radius?
Francium has the largest, Helium has the lowest. Atomic radius increases as you go to the left and downward due to the attraction of electrons and the nucleus in an atom.
What has the highest value in 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.
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.
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.
What has the smallest atomic radius?
Helium has the smallest atomic radius. This is due to trends in the periodic table, and the effective nuclear charge that holds the valence electrons close to the nucleus.
What element has the second largest atomic radius?
(A) Trends in the Atomic Radius of Elements in Period 2
| Element | Li | Be |
|---|---|---|
| Energy Level being filled (Valence Shell) | second (L) | second (L) |
| Nuclear Charge (charge on all protons) | 3+ | 4+ |
| Atomic Radius (pm) | 134 | 90 |
| General Trend | (largest) | → |
Which of the following has largest size H He Li+ be2+?
Answer. Atomic radius decreases across period and increases down a group. Li+ has the largest size.
Which ion has the maximum magnetic moment?
Ti. Mn3+ has the highest magnetic moment among the following. Mn2+ has the maximum number of unpaired electrons and hence has the maximum magnetic moment.
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.
Which ion is smaller Cl or K+?
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.
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.