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प्रश्न
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 element A is more than that that of element C.
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उत्तर
| Element | Atomic number | No. of electrons in the valence shell | Group to which the element belongs |
| A | Z - 1 | 7 | 17 |
| B | Z | ||
| C | Z + 1 |
Both A and C need one electron to get a stable configuration.
Since A belongs to group 17 while C belongs group 1, so size of atoms of A is greater than that of C hence Electron affinity of element A is more than that of element C.
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संबंधित प्रश्न
Element X is a metal with a valency 2, Y is 3 non- metal with a valency 3.
1) Write an equation to show how Y from an ion.
2) If Y is a diatomic gas, write an equation for the direct combination of X and Y to form a compound.
Give one word or phrase for the following:
The amount of energy released when an atom in the gaseous state accepts an electron to form an anion.
Define the term ‘electron affinity’.
Arrange the elements of group 17 and group 1 according to the given conditions.
Increasing electron affinity
Which has higher E.A. fluorine or Neon?
F, B, N, O (In the increasing order of electron affinity)
Why is the electron affinity of fluorine less than chlorine?
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)
