What is the electron configuration for As?

An electronic configuration is a number of electrons in the orbits of molecules and atoms. In Arsenic there are 33 electrons which lie in 4 shells. Distribution of electrons in shells is: 2, 8, 18, 5

The electronic configuration of

As is 1s22s22p63s23p63d104s24p3

[Ar]3d104s24p3

Ground state electron configuration for Arsenic is defined as:

1s22s22p63s23p64s23d104p3

There are 5 valence electrons in Arsenic.

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