WHICH ELEMENTS OF THE PERIODIC TABLE ARE THOSE
A- electronic configuration 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1
B- pit takes part of the second period, group III A.
C- Z = 54
D- electronic configuration 1s 2 2s 2 2p 6 3s 2 3p 5
E- it is an alkaline earth of the fourth period.
pls i need help, is for tomorrow
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Element having electronic configuration 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^10, 4s^2, 4p^6, 4d^10, 5s^2, 5p^3 belongs to the group in the periodic table:
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