Which ion is smallest in size?

Ion Radius (pm) Atomic Number
N 3 146 7
O 2 140 8
F 133 9
Na + 98 11

Which of the following ions is smaller in size?

The effective nuclear charge of Mg2+ is higher than the effective nuclear charge of Na+. Hence, the ionic radius of Mg2+ is smallest.

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.

Which is smaller Fe2+ or Fe3+ Why?

Fe2+ is greater in size 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.

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Which is the smallest atom in size?

atoms

Element Symbol Atomic radius in nanometers
hydrogen H 0.037
helium He 0.05
lithium Li 0.152
beryllium Be 0.111

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.

Which lanthanide ion is smallest in size?

Lutetium is the last element of the Lanthanides, so it will have the smallest ionic radius due to Lanthanide contraction.

Is Cl or K+ bigger?

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.

Is K+ bigger than Br?

Since potassium is located at the start of period 3, and bromine at the end of the same period, potassium will have a larger atomic radius than bromine, and thus the largest atomic radius of the four given atoms.

Which is larger K+ or Ar?

Explanation: And for NEUTRAL atoms, reasonably, atomic size decreases across a Period, from left to right as we face the Table, and INCREASES down a Group. … With respect to the parent atoms, potassium would be larger than argon, the which would be smaller than chlorine.

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 more stable Fe2+ or Fe3+?

Fe3+ is more stable than Fe2+. … In Fe3+ ions, there are five 3d half-filled orbitals and is more symmetrical than Fe2+. Whereas in Fe2+ ion there are four 3d half-filled orbitals and one orbital is filled.

Which is more electronegative Fe2+ or Fe3+?

Electronegativity refers to the ability of an atom to attract shared electrons in a covalent bond. The higher the value of the electronegativity, the more strongly that element attracts the shared electrons. … Since Fe2+ has one more electrons than Fe3+, it is the larger ion.

Which atom has largest size?

Thus, helium is the smallest element, and francium is the largest.

Periodic Trends — Atomic and Ionic Radii.

3A (13)
4A (14)
5A (15)
6A (16)

What has the smallest atomic radius?

Explanation: 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.

Which ion has 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.

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