 # Quick Answer: Is K Or Br Atom Bigger?

## Which ion is smaller Na+ or mg2+?

Deduce which of Na+ and Mg2+ is the smaller ion.

mg2+ would be the smaller ion this is because each ion has the same number of electrons however mg2+ has a greater number of protons and therefore is more charge dense and the outer electrons feel a greater pull from the nucleus..

## Which is larger k or k?

The size of the potassium ion depends on the location of the single electron, present on fourth energy level which is the highest, from the nucleus. 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 is mg2+ smaller than ca2+?

Cations are smaller than their parent atoms, and so the Ca2+ ion is smaller than the Ca atom. Because Ca is below Mg in group 2A of the periodic table, Ca2+ is larger than Mg2+. Consequently, Ca > Ca2+ > Mg2+.

## Why is al3+ smaller than Na+?

Al3+ because they all have the same number of electrons, however Al3+ has the most protons and therefore greatest nuclear charge. In Al3+, the same number of electrons are being attracted by more protons in the nucleus, so the electrons are being pulled closer to the nucleus, reducing the size of the ionic radius.

## Which atom has the smallest atomic radius?

HeliumHelium 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. Atomic radius decreases as you move across a period from left to right and decreases as you move up a group from bottom to top.

## Which ion has the largest radius?

K+ ionExplanation: 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.

## Which is larger nitrogen or oxygen?

Nitrogen molecules (N2) are larger than oxygen molecules (O2) so therefore, pure nitrogen will permeate the walls of your tires less than oxygen molecules. But by how much? Well, a nitrogen molecule measures roughly 300 picometers while an oxygen molecule measures 292 picometers. That’s only a 2.6% difference in size.

## Why is K bigger than Br?

Now focus on potassium and bromine. 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.

## Why is K bigger than CA?

Obviously potassium(K) because it has less number of protons in nucleus as well as less number of electrons in its orbit as compare to calcium(Ca) therefore it has less attraction force between orbit and centre nucleus than calcium. K has a larger radius, because K has 19 protons with it and Ca has 20 protons.

## Which is larger K+ or Ar?

K+ has one more proton in its nuclei than Ar, so I would expect that if both have the same electron configuration – the one with more protons in its nuclei would have the smaller radius since the electric force between its nuclei and its electrons is bigger, hence pulling the two closer together…

## Is n3 Isoelectronic?

a) Isoelectronic means that the ions have the same number of electrons in the same arrangement. … Make life easier by first sorting them into Periodic Table order: N3- O2- F- Na+ Mg2+ Al3+ These are all isoelectronic with the structure 2,8.

## Which atom has the highest ionization energy?

heliumThe ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.

## Which atoms has the largest atomic radius?

The element which has the largest atomic radius is Cesium. Atomic Radius is defined as the distance between the center of the nucleus and the outermost shell of an atom. Cesium has 6 orbital shells, which means that it automatically is big.

## Which is the smallest atom?

If by “biggest” and “smallest”, you mean mass (which is a measure of how much matter is there), then the smallest is the hydrogen atom with one proton and one electron. Since electrons are about 2000 times less massive than protons (and neutrons), then the mass of an atom is mostly from the protons and neutrons.

## Which atom is larger 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.

## Why is K+ larger than ca2+?

K+ is larger than Ca2+ . is larger than . |rmK+ is larger than Ca2+ because Ca2+ has the greater charge. |rmK+ is larger than Ca2+ because the increase in electron repulsions that accompany addition of an electron causes the electron cloud to expand.

## How do you determine which atom is the largest?

Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.