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प्रश्न
पर्याय
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
Arrange the following as per the instruction given in the brackets:
He, Ar, Ne (Increasing order of the number of electron shells)
Arrange the elements of second period in increasing order of their electron affinity. Name the elements which do not follow the trend in this period.
Give reason:
Electronegativity of chorine is higher than Sulphur?
Explain the following:
Halogens have a high electron affinity.
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.
Arrange the following in increasing order of property indicated
F, Cl, Br, I (electron affinity)
What is 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:
In a period, increase in electron affinity increases ______.
The electron affinity of an element X is greater than that of element Y.
- How is the oxidising power of X likely to compare with that of Y?
- How is the electronegativity of X likely to compare with that of Y?
- State whether X is likely to be placed to the left or to the right of Y in the periodic table?
