Question: Which of these ions is the smallest?

The periodic table is arranged in the order of increasing proton number. Phosphorus comes the first among the five species and contains the least number of protons. Its ion would be the largest among the five. Calcium comes the last and forms the smallest ion.

Which ion is the smallest?

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 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 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.

Which ion is largest?

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.

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 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.

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.

Which is bigger Cl or Br?

As Br is smaller than Cl; therefore, Br- have a smaller ionization energy than Cl-. In short, since the outermost electron in bromine is farther from the nucleus than the outermost electron in chloride, it takes less energy to remove the outermost electron in bromide.

Is Cl or I bigger?

For Cl to become Cl- ion, it must accept an electron. … This is because the nucleus still has 17 protons but the number of electrons in the ion now is 18 unlike the 17 in a neutral atom. Also, inter-electronic repulsion increases. Hence, overall size of the ion is more.

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Is S or S2 bigger?

(ii) Explain why the radius of the S2- ion is larger than the radius of the S atom. The nuclear charge is the same for both species, but the eight valence electrons in the sulfide ion experience a greater amount of electron-electron repulsion than do the six valence electrons in the neutral sulfur atom.

Is O or O2 larger?

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−.

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.

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 atom or ion is smaller Cl or Br?

Compare the sizes of sodium and chloride ions with the sizes of sodium and chlorine atoms. Positive ions are smaller than the atoms they come from. Sodium is 2,8,1; Na+ is 2,8.

electronic structure of ion ionic radius (nm)
Cl- 2, 8, 8 0.181
Br- 2, 8, 18, 8 0.196
I- 2, 8, 18, 18, 8 0.220
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