The ratio of the atomic number of two elements ‘A’ and ‘B’ is 2:3. 'A' is an inert gas with the first three orbits completely filled. Identify ‘A’ and ‘B’ and write their electronic configuration.
'A' is an inert gas with the first three orbits completely filled. Its electron configuration will be [Ar] 3d104s24p6 or 1s2 2s22p63s2 3p6 4s23d10 4p6.
The atomic number of ‘A’ is 36.
The ratio of the atomic number of two ‘A’ and ‘B’ is 2:3. so the Atomic number ‘B’ will be 54.
The element ‘B’ is Xenon and its electron configuration will be Electron configuration: [Kr]4d10 5s2 5p6 or 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6.