Question
Which of the following sequences correctly represents
the electron affinity of the halogens?Solution
Electron affinity generally increases across a period and decreases down a group due to atomic size and electron-electron repulsion in smaller atoms. Among halogens, chlorine has a higher electron affinity than fluorine due to its larger size allowing easier addition of an electron, making the order I < Br < Cl < F.
21 32 54 86 131 186
...Find the wrong number in the given number series.
2, 4, 12, 48, 120, 1440
Find the wrong number in the given number series.
77, 101, 139, 197, 281, 413
The series given below contains a sequence of numbers.
Accordingly identify the incorrect number.
9, 14, 24, 38, 59
8137, 5405, 3669, 2701, 2201, 1997
9256 6844 4888 3350 2152 1276
3, 4, 9, 28, 116, 566, 3397
112, 236, 374, 546, 790, 1376
Find the wrong number in the given number series.
58, 74, 61, 79, 64, 82
128, 132, 123, 139, 113, 150
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