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प्रश्न
विकल्प
True
False
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उत्तर
False.
Concept Insight: (i) There is inverse relation between atomic size and electron affinity. More is the size, less is the electron affinity and vice versa because more is the size of atom, more is the distance between the nucleus and last shell to which electron enters. This results in decrease in force of attraction between the nucleus and incoming electron and hence the electron affinity decreases. Fluorine has smaller size than chlorine so it must have less electron affinity than chlorine.
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संबंधित प्रश्न
Choose the correct answer from the options given below:
If an element A belongs to Period 3 and Group II, then it will have
A. 3 shells and 2 valence electrons
B. 2 shells and 3 valence electrons
C. 3 shells and 3 valence electrons
D. 2 shells and 2 valence electrons
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?
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 of element C.
- lonization energy of element C is less than that of element A.
- Electron affinity of B is zero.
Fill in the blank
Noble gases have ______ electron affinity.
Explain
Halogens have high electron affinity.
Choose the correct answer:
Among the period 2 elements the one which has high electron affinity is
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:
On descending a group, ______ in ionisation potential as well as electron affinity ______ oxidising capacity.
