Cl
The element with the electron configuration of 1s22s22p63s23p6 is neon, which has atomic number 10 and is a noble gas.
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 element with the electron configuration 1s22s22p63s23p5 is chlorine (Cl). This electron configuration indicates that chlorine has 7 valence electrons, which is typical for Group 17 elements.
The element with this electron configuration is manganese (Mn), which has 25 electrons.
The element with this electron configuration is carbon (C). This electron configuration corresponds to 6 electrons, which is the atomic number of carbon.
Vanadium ( V) has that configuration. Its atomic number is 23.
The element with the electron configuration 1s2 2s1 is lithium.
The element with a valence electron configuration of 3s^23p^3 is phosphorus.
This electron configuration corresponds to the element Palladium (Pd), which has the atomic number 46. It has the electron configuration [Kr] 5s2 4d10.
The element with electron configuration 1s22s23p1 is phosphorus, which has an atomic number of 15.
Sulfur (S) has the electron configuration 1s22s22p63s23p4.
Sodium has the electron configuration of neon.
The electron configuration of sulfur is [Ne) 3s2.3p4.
Chloride ion (Cl-) has an electron configuration of 1s2 2s2 2p6 (full shell). Chlorine atom (Cl) has an electron configuration of 1s2 2s2 2p6 3s2 3p5 (one electron short of a full shell).