The electron configuration 1s22s22p63s23p64s23d104p3 represents Arsenic.
The electronic configuration is represented as follows;
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³.
Count the number of electrons to know the element. The number of electron in an electronically neutral atom is equal to the number of proton.
The number of proton is the atomic number of the element. Therefore,
2 + 2 + 6 + 2 + 6 + 2 + 10 + 3 = 33
The atomic number is 33. The element with atomic number of 33 is Arsenic. Therefore, the element is Arsenic.
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