Nitrogen(N) has the electron configuration 1s²2s²2p³
Further explanation
In an atom, there are levels of energy in the shell and subshell
This energy level is expressed in the form of electron configurations.
Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub-shells in the shell of an atom, namely s, p, d, and f. The maximum number of electrons for each subshell is
- s: 2 electrons
- p: 6 electrons
- d: 10 electrons and
- f: 14 electrons
Charging electrons in the subshell uses the following sequence:
1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.
The number of electrons in the electron configuration of an element shows the atomic number (in neutral atoms)
Element has the electron configuration 1s²2s²2p³
If we count the number of electrons we will get: 2+2+3 = 7
Number of electron = atomic number = 7
If we look at the periodic system, the element with atomic number 7 is the gas element N(Nitrogen) which is located in group 5A
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