1.

The ratio of the atomic numbers of two elements A and B is 2:3 A is an intery gas the first 3 orbits completely filled. Identify A and B and write their electronic configurations.

Answer»

Solution :`ATO` electronic CONFIGURATION `-2,8,18,8`. Thus, the atomic number `=36`.
`A:B=2:3`
`THEREFORE B=(36xx3)/(2)=54`
The electronic configuration of
`B=2,8,18,18,8`


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