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Question
An element in period 3 whose electron affinity is zero.
Options
Neon
Sulphur
Sodium
Argon
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Solution
Argon
Explanation:
Argon is an inert gas. It does not need to gain or lose electrons because its octet is complete. As a result, argon has no electron affinity.
RELATED QUESTIONS
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.
Electron affinity values generally _______ across the periods left to right and ______ down the group top to bottom.
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.
Explain
Halogens have high electron affinity.
With reference to the variation of properties in the Periodic Table, which of the following is generally true?
Electron affinity increases going down a group.
The following questions refer to the Periodic Table.
Which of the elements has the greatest electron affinity among the halogens?
On descending a group, ______ in ionisation potential as well as electron affinity ______ oxidising capacity.
The electron affinity of an element X is greater than that of element Y.
State whether X is likely to be placed to the left or to the right of Y in the periodic table.
Arrange the following as per instruction given in the bracket.
Cl, F, Br, I (increasing electron affinity)
