Argon Ar
The element with the electron configuration 1s22s22p63s23p5 is fluorine (F).
Iron (Fe) is the element that has 4 unpaired electrons in its electron configuration.
I suppose that you think to gallium.
The element that contains the first p electron is boron, which has an atomic number of 5. Boron's electron configuration is 1s2 2s2 2p1, meaning that the first p electron is found in the 2p orbital.
There are 86 core electrons in radium (Ra), which is the number of electrons in filled inner electron shells. Radial's electron configuration is [Rn] 7s2, where [Rn] represents the electron configuration of radon (Rn) as the previous noble gas element.
The abbreviated electron configuration for argon is [Ne] 3s^2 3p^6. The [Ne] represents the electron configuration of the noble gas neon, which has the same electron configuration as the inner electrons of argon.
The electron configuration 1s22s22p63s23p64s23d5 is for manganese. Not 3d !
The electron configuration and noble gas core for Li+ is that of He: Li+: (1s2, 2s0)
The electron configuration of argon is [Ne] 3s2 3p6, where [Ne] represents the electron configuration of neon. Argon has 18 electrons, with 2 electrons in the 3s orbital and 6 electrons in the 3p orbital.
The element with this electron configuration is carbon (C). This electron configuration corresponds to 6 electrons, which is the atomic number of carbon.
The element with this electron configuration is manganese (Mn), which has 25 electrons.
Vanadium ( V) has that configuration. Its atomic number is 23.
Perhaps the electronic configuration of Chromium? Ar for argon, argon has 18 electrons. Electronic configuration of argon can be written as 1s22s22p63s23p6. Electronic configuration of chromium is 1s22s22p63s23p63d54s1. As you can see you can just replace that long chain of figures in front of 3d54s1 with just Ar. Hence, [Ar]3d54s1.
Lithium (Li) has the electron configuration 1s2 2s1.
The electron configuration of phosphorus is [Ne]3s2.3p3.
The element with the electron configuration 1s22s22p63s23p5 is fluorine (F).
This electron configuration corresponds to the element Palladium (Pd), which has the atomic number 46. It has the electron configuration [Kr] 5s2 4d10.