1s2 2s2 2p6 3s2 3p6 4s2 3d5
1s22s22p63s23p64s23d5
5s2 5d3
The electron configuration for Mg2+ is 1s22p22p6.
Phosphorus To determine an element from its electron configuration, simply add up the superscript numbers (those are the numbers of electrons in each sublevel): 1s22s22p63s23p3: 2+2+6+2+3=15, and find the element with the matching atomic number*. In this case, Phosphorus. *Note: This method is not correct if the electron configuration of an ion is given, as the number of electrons in an ion does not match its atomic number.
1s2 2s2 2p6 3s2 3p3 (phosphorous)
1s22s22p63s23p64s23d5
5s2 5d3
The electron configuration for Mg2+ is 1s22p22p6.
The electron configuration for chlorine is 1s2 2s2 2p6 3s2 3p5.
1s2 Or, He(2) i.e., Helium has only two electrons and it is a completely filled first shell making it the simplest noble gas.
Phosphorus To determine an element from its electron configuration, simply add up the superscript numbers (those are the numbers of electrons in each sublevel): 1s22s22p63s23p3: 2+2+6+2+3=15, and find the element with the matching atomic number*. In this case, Phosphorus. *Note: This method is not correct if the electron configuration of an ion is given, as the number of electrons in an ion does not match its atomic number.
1s^22s^22p^63s^23p^3
1s2 2s2 2p6 3s2 3p3 (phosphorous)
The shorthand electron configuration allows all of the electrons in a noble gas preceding an element to be omitting and written by [nobel gas name]. For nitrogen, the noble gas preceding it is He. Thus, its configuration is [He]2s2 2p3.
The correct electron configuration of indium (In) is [Kr]4d105s25p1. Refer to the related links for a printable Periodic Table with electron configurations.
The electronic configuration for aluminum is 1s22s22p63s23p1 .
[Xe]6s25d1