What are the trends going down the group for group 1?
Explaining the trend The reactivity of group 1 elements increases as you go down the group because: the atoms become larger. the outer electron becomes further from the nucleus. the force of attraction between the nucleus and the outer electron decreases.
What is the atomic radius of group 1?
| Group 1 elements | Na | Li |
|---|---|---|
| Atomic radius (Pm) | 186 | 152 |
Which element in group 1 has the greatest atomic radius?
Trends in Atomic Radius of Group 1 Elements
| name | atomic radius (pm) | Trend |
|---|---|---|
| sodium | 186 | ↓ |
| potassium | 425 | ↓ |
| rubidium | 244 | ↓ |
| caesium | 262 | largest |
Which element has the largest ionic radius in group 1?
(A) Comparison of Atomic and Ionic Radius of Group 1 (IA, alkali metals) Elements
| Element | Symbol of Atom | Atomic Radius (pm) |
|---|---|---|
| sodium | Na | 154 |
| potassium | K | 196 |
| rubidium | Rb | 211 |
| cesium | Cs | 225 |
Which has largest atomic size in group 1 and why?
The largest elements in group 1, 2 and 3 are helium, lithium and sodium respectively. Out of these elements, sodium is the largest in size due to the presence of three shells whereas lithium has two and hydrogen has one shell only.
What is the trend in electronegativity going down a group in Model 1?
The electronegativity decreases as you go down a group in Model 1.
What is the trend in reactivity down group 1?
The reactivity of Group 1 elements increases as you go down the group because: the atoms get larger as you go down the group. the outer electron gets further from the nucleus as you go down the group.
Why does the atomic radius increase down a group?
Down a group, the number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital. This results in a larger atomic radius.
Does ionic radius decrease down a group?
The size of an element’s ionic radius follows a predictable trend on the periodic table. As you move down a column or group, the ionic radius increases. This is because each row adds a new electron shell. Ionic radius decreases moving from left to right across a row or period.
Which is the biggest atom in the first group?
Thus, helium is the smallest element, and francium is the largest.
Which group has largest atomic radius?
The radii generally decrease along each period of the table, from left to right; and increase down each group.So sodium of group I has the largest atomic radius.
Does atomic radius increase down a group?
Atomic radius is the distance from the atom’s nucleus to the outer edge of the electron cloud. In general, atomic radius decreases across a period and increases down a group.
What happens to the size of atoms atomic radius as you go down a group in the periodic table?
When moving down a group of the periodic table, the atomic radius increases because of the presence of additional principal energy levels, which are further away from the nucleus.