The electronic configuration for elements a and b are:
a: 1s^2 2s^2 2p^6 3s^1
b: 1s^2 2s^2 2p^6 3s^2 3p^6 3d^6 4s^2
deduce the position of each element in the periodic table.

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Sun is explosive itself spread 9 planets.earth is 3rd explosive in the solar system about 500 hundred million years ago . first earth became ice age and freezing climate.centre of earth magma. north zone is artic . south is anatric

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