Why is K+ smaller than Na+?

K+ is larger than Na+ because the ionic radius increases in a particular group on moving from top to bottom due to increase in the principle energy shell though the number or electrons in the valence shell remain the same.

Why is the Na+ ion smaller?

Consider also that Na+ has as many electrons as Ne, but Na+ has one more proton than Ne to attract the electrons closer to the nucleus, thus resulting in a smaller size compared to both Ne and Na.

Which has smaller size Na or Na+ and why?

Na+ ion is smaller than Na because Na looses its one electron to become Na+ ion so the positive charge of nucleus per electron present will increase and it result more electrostatic force of attraction increases . Hence size decreases.

Which ion is the smallest in size?

Consequently, the ion with the greatest nuclear charge (Al3+) is the smallest, and the ion with the smallest nuclear charge (N3−) is the largest….Ionic Radii and Isoelectronic Series.

Ion	Radius (pm)	Atomic Number
N3−	146	7
O2−	140	8
F−	133	9
Na+	98	11

Which is bigger in size Na or Na+ Why?

Answer Expert Verified 1) The atomic number of sodium is 1 and it has 11 protons and 11 electrons with outer electron as 3s1 whereas Na+ ion has 11 protons but only 10 electrons. 2) The 3s shell of Na+ has no electrons in it. 3) So the outer shell configuration is 2s2 2p6. 5) As a result the Na+ ion shrinks in size.

Which is greater in size Na or K?

As an example, potassium (K) has a larger average atomic radius (220 pm)than sodium (Na) does (180 pm). The potassium atom has an extra electron shell compared to the sodium atom, which means its valence electrons are further from the nucleus, giving potassium a larger atomic radius.

Which is larger Cl or K+?

K+ has a 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 a larger atomic radius.

Which lanthanoid ion is smallest in size?

The lanthanide contraction is the greater-than-expected decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, which results in smaller than otherwise expected ionic radii for the subsequent elements starting with 72, hafnium.

Why a sodium ion Na+ is smaller than a fluoride ion F −?

The sodium ion has 11 protons while the fluoride ion has 9 protons. Since the sodium ion has more protons, it has a greater nuclear charge and will draw its electrons closer to the nucleus giving it a smaller ionic radius than the fluoride ion.

What is the difference between Na and Na+?

Na is symbol of normal sodium atom which have 11 protons in nucleus , with electronic configuration (2,8,1) having total 11 electrons in its all 3 shells. But Na+ is positive ion of sodium. during chemical reaction sodium atom (Na) loses his one electron present last orbit.

Which is bigger K or K+ and why?

The K+ ion has its outermost electrons on the third energy level now and is size is smaller than that of K ion. Hence, K is larger than K+.

Why does na+ have a smaller radius than Na?

Cations of a given element have a smaller radius than the neutral atom so that Na + will decrease in size compared with the Na atom. Sodium atoms and sodium ions have the same number of protons. Each one has 11 protons. This is because the atomic number of sodium is 11. The sodium atom has 11 electrons.

Which has larger size Na+ or MG++?

Both Na+ and Mg++have 10 electrons surrounding them. But sodium has 11 protons while magnesium has 12 protons. So, Mg generates a large attraction between the nucleus and electrons which causes it to be smaller ion. Hence, Na+has larger size.

Is the K+ ion smaller than the neutral atom?

This of course implies that the ion is actually smaller in size when compared with the neutral atom. When atoms of potassium (K) and fluorine (F) combine to form salt (KF), the K+ ion is smaller than the K atom, while the F– ion is larger than the F atom.

Is na^+ bigger than Cl^-?

Na^+ is smaller than Na; and Cl^- is larger than Cl. Atomic Cl should be smaller than atomic Na, given their position on Period 3. And anionic Cl^- should be larger than Na^+, with respect to their parent atoms.