The superscript 3 in 4pº tell that there are 3 electrons in this orbital
Further explanation
In an atom there are levels of energy in the shell and sub shell
This energy level is expressed in the form of electron configurations.
There are 4 sub-shells in the shell of an atom, namely s, p, d, and f. The maximum number of electrons for each sub-shell is
• s: 2 electrons
• p: 6 electrons
• d: 10 electrons and
• f: 14 electrons
Charging electrons in the sub-shell uses the following sequence:
1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.
Arsenic is an element with the symbol As, which has an atomic number of 33 and a mass number of 75
Electron configuration of As : [Ar] 3d¹⁰4s²4p³
Each superscript shows the number of electrons that occupy each orbital
For the p orbital there are a maximum of 6 electrons, while the 4p³ orbital shows that there are 3 electrons in this orbital