# Why is one atom bigger than another?

## Why is one atom bigger than another?

As you go down the periodic table, usually atoms get bigger because n gets bigger (there are electrons in higher shells). When you remove electrons, making cations, there are less electrons and less electron-electron repulsions, so the cation is smaller than the atom.

Why does argon have the smallest atomic radius?

This happens because no shells are being added since all the electrons in that period (the row) belong in the same shell. Because Argon is to the right of Chlorine and on the same period, Argon has an atomic radius less than Chlorine’s atomic radius.

Is S or S2 bigger?

(ii) Explain why the radius of the S2- ion is larger than the radius of the S atom. This extra repulsion in the sulfide ion increases the average distance between the valence electrons, so the electron cloud around the sulfide ion has the greater radius.

### Is P or P3 bigger?

With atoms, the effective nuclear charge refers to the net charge experienced by an atom’s outermost electrons. Learn about effective nuclear charge and periodic trends. Review atoms, the periodic table, electrons, and shielding effects. Electron affinity is the energy change that occurs as an atom gains electrons.

Why are atoms smaller than others?

atoms or ions that have the same number of electrons. As the charge on the nucleus becomes larger, the nucleus can hold a constant number of electrons more tightly. As a result, the atoms or ions become significantly smaller.

Why are some atoms smaller?

As you move from left to right across a period, the number of protons in the nucleus increases. The electrons are thus attracted to the nucleus more strongly, and the atomic radius is smaller (this attraction is much stronger than the relatively weak repulsion between electrons).

## Why is AR bigger than CL?

The size of argon is greater than chlorine because of the interelectronic repulsions start taking place when an atom attain its octet.

Is AR smaller than CL?

Argon is bigger than chlorine because argon being inert it’s outermost shell is completely filled thus a force of repulsion acts between the outermost electron and the nucleus causing it to grow bigger in size than chlorine.

Is AR bigger than Ca2+?

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.

### Which has smaller size S or S2?

Ionic radii follow the same vertical trend as atomic radii; that is, for ions with the same charge, the ionic radius increases going down a column. The reason is the same as for atomic radii: shielding by filled inner shells produces little change in the effective nuclear charge felt by the outermost electrons.

Is CL smaller than CL?

Chlorine has a proton number of 17. Hence, we can deduce that the forces of attraction exerted on the outermost electron in chloride ion is lesser than chlorine atom, since there are more electrons. Conclusion, chloride ion has a bigger atomic radius due to an increase in number of electrons.

Why is the radius of K+ larger than 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… Never heard K + being larger than Ar.

## Why is the atomic size of argon smaller than of sodium?

Hence argon’s atomic size is lesser than of sodium. The outer or valence electrons are pulled closer towards the nucleus as the positive charge in the nucleus increases resulting in a decrease in theatomic radius across the period.

Why does Cl have a higher atomic radius than AR?

Actually, Cl has a greater atomic radius than Ar because of the greater attraction from the nucleus in Ar. Relative atomic radius is mostly determined by how many electron shells there are and by the number of protons that are in the nucleus.

Why does argon have a higher atomic radius than chlorine?

As sodium is in left has bigger atomic size than chlorine The size of argon is greater than chlorine because of the interelectronic repulsions start taking place when an atom Why does argon have a higher atomic radius than calcium? Actually, Cl has a greater atomic radius than Ar because of the greater attraction from the nucleus in Ar.