Q.

Two elements A and B have following electronic configurationA=1s22s22p63s23p64s2B=1s22s22p63s23p3 It is expected that they form a compound AxBy then sum of x and y is : (Ignore charge only observe the value)

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answer is 5.

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Detailed Solution

A3B2 by observing the electronic configuration we can see that A is Calcium and B is phosphorous.

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