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प्रश्न
Explain the following:
Halogens have a high electron affinity.
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उत्तर
The atomic size of halogens is very small. The smaller the atomic size, the greater the electron affinity, because the effective attractive force between the nucleus and the valence electrons is greater in smaller atoms, and so the electrons are held firmly.
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संबंधित प्रश्न
Give reason:
Electron affinity of halogens is comparatively high ?
An element in period 3 whose electron affinity is zero.
A, B, C are three elements in which B is an inert gas other than helium.With this information complete the following table.
| Element | Atomic number | No. of electrons in the valence shell | Group to which the element belongs |
| A | Z - 1 | ||
| B | Z | ||
| C | Z + 1 |
Also, explain the following : Electron affinity of B is Zero.
Fill in the blank
Energy released when electron is added to a neutral gaseous atom is called ______.
State whether the following statement is true or false
Al2O3 is an amphoteric oxide.
Explain
Halogens have high electron affinity.
Arrange the following as per instruction given in the bracket.
Cl, F, Br, I (increasing electron affinity)
The changes in the properties of elements on moving from left to right across a period of the Periodic Table. For the property, choose the correct answer.
The electron affinity of elements in groups 1 to 7:
Arrange the following as per instruction given in the bracket.
Cl, F, Br, I (increasing electron affinity)
State electron affinity unit.
