Iron has two valence electrons. The atomic number or iron is 26, and it has 26 electrons and 26 protons. The electron configuration of iron is 1s22s22p63s23p63d64s2 or 2, 8, 14, 2 electrons per shell, so an atom of iron has two electrons in the outermost shell.Know More
When an atom of iron loses the two electrons from the last shell, it has a valency of +2, and when it loses two electrons from the 4s subshell and one electron from the 3d subshell, it has a valency of +3.
Iron is a transition metal and is placed in group eight or d-block and period four of the periodic table of elements. The melting point of iron is 2,800 degrees Fahrenheit.Learn more about Atoms & Molecules
Argon has eight valence electrons. Its electron configuration is 1s2 2s2p6 3s2p6, so it has three filled electron shells of 2, 8 and 8. The atomic number of argon is 18.Full Answer >
Mercury has two valence electrons, both of which sit in the atom's 6s shell. A valence electron is an electron in the outermost shell of an atom. Valence electrons are capable of bonding with the valence electrons of other atoms to form a compound.Full Answer >
Hydrogen has one valence electron because it is an element found in group 1 of the periodic table. It is a simple task to find the number of valence electrons from the periodic table by looking at the group number found above each column. Similarly, the electrons found in an atom's outer shell are called valence electrons.Full Answer >
Helium has two valence electrons. As an element, helium is very stable and contains a single s-orbital on its outer shell.Full Answer >