Which is bigger Na or RB?

Which is bigger Na or RB?

Generally, the atomic radius increases down the group. Both Rb and Na are in the same group, group 1. Rb is below Na and thus we expect Rb to have a…

Why Ca 2 is smaller than K+?

Ca2+ has smaller ionic radius than K+ because it has more nuclear charge. In a given period, on moving from left to right, the nuclear charge increases without addition of shell. The increased nuclear charge attracts the electrons more strongly towards the nucleus. This decreases the ionic size.

Which species is smaller Ca2+ or K+?

it has Ca2+ has a smaller ionic radius than K+ because it has higher z/e ratioIn isoelectronic species, as the number of protons (atomic number) goes on increasing, the size goes on decreasing due to stronger attraction on the electrons.

Is S or S 2 smaller?

Difference between SandS2- implies larger radii and larger size of S2-. As the radii of the anion is always larger than the atomic radii of its parent atom.

Which is bigger S or S 2?

(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.

Which is bigger O 1 or O 2?

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 larger K+ or 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.

Is Ca2+ smaller than AR?

Ca2+ vs. Ar: Ca has a +20 nucleus, Ar’s is +18. Thus Ar will have a smaller Zeff (=+18-10 = +8 vs. +20 – 10 = +10 for Ca2+) and a larger radius.

What is the correct order of size of K K+ Ca Ca2+?

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 is larger Li+ or Na+?

As Na atom is larger than Li atom, therefore, Na+ ion is also bigger in size than Li+ion. (v) P or As: Both these atoms belong to group 15 of the periodic table. Since As is placed after P, therefore its size is large because atomic size increases down the group.

Which pair has largest size difference?

Rb,Cs.

Is Li+ larger than Na+?

The valence electrons in the Na+ ion are in a higher principal energy level than the valence electrons in the Li+ ion. Because the Li+ ion is smaller than the Na+ ion, the Coulombic attractions between ions in LiCl are stronger than in NaCl. This results in a greater lattice enthalpy.

Is RB+ smaller than Li+?

Rb+ Is Smaller Than Li+ B.

Which of the following has the smallest radius rb K+ K Rb+?

The trend of elemental radius increases from top to bottom and from right to left. This means Rb is greater than K. Incorporating the positive charges, K+ is smaller than K and Rb+ is smaller than Rb. Thus, the trend in increasing order is K+,K,Rb+,Rb.

Is Na+ or O2 larger?

In other words, Na+ has bigger effective nuclear charge than O2− , 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 sodium cation. Therefore, the oxide anion will have the larger atomic radius.

Which ion is larger S2 or K+?

S2− is larger than K+ because the decrease in electron repulsions that accompany addition of an electron causes the electron cloud to expand. S2− is larger than K+ because the two ions are isoelectronic and K+ has the larger Z and Zeff.

Is a magnesium ion bigger than a sodium ion?

(i) The sodium ion (Na+) is larger than the magnesium ion (Mg2+) due to two effects. If one were comparing just the neutral atoms Mg and S, the S atom would be smaller as both elements are in the same period and sulfur is more to the right.

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