# Which element has the 2nd smallest atomic radius?

Contents
Helium 31 pm 161 pm
Neon 38 pm 165 pm
Fluorine 42 pm 166 pm
Oxygen 48 pm 167 pm
Hydrogen 53 pm 169 pm

## Which element in Period 2 has the smallest atomic radius?

Fluorine is the element with smallest atomic radii.

## Which element group has the smallest atomic radius?

Explanation: Helium 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 of the following has smallest radius?

Hence, Cl has the smallest radius.

## Which element has largest radius?

Explanation: Francium has the largest, Helium has the lowest. Atomic radius increases as you go to the left and downward due to the attraction of electrons and the nucleus in an atom.

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## What element in the second period has the largest atomic radius?

The element in the second period that has the largest atomic radius is the Lithium (Li).

## How do you find atomic radius?

Atomic radius is determined as the distance between the nuclei of two identical atoms bonded together. The atomic radius of atoms generally decreases from left to right across a period. The atomic radius of atoms generally increases from top to bottom within a group.

## Which is larger P or P3?

Ar: P has a +15 nucleus, Ar’s is +18. Thus P3- will have a smaller Zeff (=+15-10 = +5 vs. +18 – 10 = +8 for Ar) and a larger radius.

## Which element has the largest radius Na or CS?

(A) Comparison of Atomic and Ionic Radius of Group 1 (IA, alkali metals) Elements

Element Symbol of Atom Ionic Radius 4 (pm)
sodium Na 102
potassium K 138
rubidium Rb 149
cesium Cs 170

## What is the largest atomic radius in Group 18?

The Electron Configurations for Noble Gases

Atomic # Atomic radius (pm)
Ar 18 71
Kr 36 88
Xe 54 108
Rn 86 120

## Which element has a larger atomic radius than phosphorus?

Atomic Radius of the elements

Helium 31 pm 161 pm
Phosphorus 98 pm 183 pm
Selenium 103 pm 184 pm
Xenon 108 pm 185 pm
Silicon 111 pm 188 pm

## Which of the following has the minimum atomic radius?

Fluorine has a minimum atomic radius. The atomic radius of Fluorine is 42 pm.

## Is Br or Br bigger?

Br – will have the largest atomic size because Br- has one extra electron in its valence shell which due to its unbalanced negative charge will be repelled and hence the atomic radius of Br- will increase.

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## Which ion has the largest atomic radius?

1 Answer. Ernest Z. K+ has the largest radius.

## Which has larger atomic radius K 19 or CA 20?

Answer. Answer: Potassium ( k ) – > atomic number 19 has larger atomic radii.

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