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 has smallest radius?
Hence, Cl has the smallest radius.
Which element in group 1 has the smallest atomic radius?
(A) Trends in the Atomic Radius of Group 1 (IA, Alkali Metals) Elements
| Element | Atomic Number (Z) | Trend |
|---|---|---|
| lithium | 3 | smallest | |
| sodium | 11 | ↓ |
| potassium | 19 | ↓ |
| rubidium | 37 | ↓ |
Which of the following has the minimum atomic radius?
Fluorine has a minimum atomic radius. The atomic radius of Fluorine is 42 pm.
Which of the following has the smallest atomic radius group of answer choices?
As we move along a period radius decreases and as we move down the group, radius increases so F have smallest radius.
What has the largest atomic radius?
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.
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 element has the largest atomic radius in Group 1?
Trends in Atomic Radius of Group 1 Elements
| name | atomic radius (pm) | Trend |
|---|---|---|
| sodium | 186 | ↓ |
| potassium | 425 | ↓ |
| rubidium | 244 | ↓ |
| caesium | 262 | largest |
What is Group 7 called?
Group 7 – Halogens
The Group 7 elements are placed in the vertical column, second from the right-hand side of the periodic table. … Fluorine, chlorine, bromine, iodine, and astatine, all belong to Group 7.
Why does lithium have the largest atomic radius?
The effective nuclear charge is simply a measure of the net positive charge that affects the outermost electrons in an atom. In lithium’s case, the outermost electron is being screened from the nucleus by two core electrons. … That is why lithium has a larger atomic radius than beryllium.
Which of the following has the largest radius?
Thus O2− has a minimum z-effective thus largest radius.
Which element has the smallest atomic radius quizlet?
Therefore, rubidium has the largest atomic radius whereas helium has the smallest.
Which one of the following atoms n p/s o has the largest atomic radius?
So Cesium has the largest atomic radius among the given elements.
Does CA or NI have a larger atomic radius?
Ca or Ni: the atomic radius of calcium is 194 pm while that of nickel is 149 pm.
What is the atomic radius of K?
280 pm
What is the atomic radius of SI?
210 pm