2nd October 2019
How many electrons does cobalt have in its outermost electron shell?
Cobalt is a transition metal in the fourth period that is slowly filling up its third shell with electrons. Cobalt has fifteen electrons in its third shell that holds a maximum of eighteen electrons (as seen in zinc).
Cobalt (Co) has an atomic number of 27, which means it has 27 electrons and protons. Shells hold up to two electrons in the first and eight electrons in the outer shells. So cobalt's electron configuration with 27 electrons should look like this: 2-8-8-8–1. However, each shell is made up of orbitals, s, p, d, e, f, …
So when we add up the valence electrons for the NO+ Lewis structure we have a total of 10 valence electrons. In order to satisfy the octets on both the Nitrogen and Oxygen atom in the NO+ Lewis structure it is necessary to form a triple bond.
27 protons in cobalt, so 27 electrons in a (neutral) cobalt atom. For the 2+ ion you need two fewer for a total of 25.
Cobalt is somewhat of a reactive element. It combines with oxygen in the air, but does not catch on fire and burn unless it is in powder form. Cobalt has the ability to react with most acids to produce hydrogen gas. However cobalt does not react with water that is at room temperature.
|Atomic Mass||8.9332 atomic mass units|
|Number of Protons||27|
|Number of Neutrons||32|
|Number of Electrons||27|
The electrons surrounding an atom are located in regions around the nucleus called “energy levels”. An energy level represents the 3-dimensional space surrounding the nucleus where electrons are most likely to be. The first energy level is closest to the nucleus.
|Orbitals and Electron Capacity of the First Four Principle Energy Levels|
|Principle energy level (n)||Type of sublevel||Maximum number of electrons (2n2)|
So if we look at the ground state electron configuration of cobalt, we see that the 3d sublevel is not full. There are two d orbitals having paired electrons with opposite spin, and three d orbitals having one unpaired electron, each with the same spin.
Isotopes: Cobalt has 22 isotopes whose half-lives are known, with mass numbers 50 to 72. Naturally occurring cobalt consists of its one stable isotope, 59Co.
The electron configuration of Cobalt is 27Co [Ar] 4s2 3d7. The number of valence electrons are held in the outtermost energy level or shell which in this case is 4 ; so THE NUMBER OF VALENCE ELECTRONS of Cobalt is 2. Originally Answered: How can we say the valency of cobalt?
Cobalt was discovered by Georg Brandt, a Swedish chemist, in 1739. Brandt was attempting to prove that the ability of certain minerals to color glass blue was due to an unknown element and not to bismuth, as was commonly believed at the time. Cobalt's primary ores are cobaltite (CoAsS) and erythrite (Co3(AsO4)2).
The number of valence electrons of an element is always the same as the group number, so zirconium therefore has 4 valence electrons and is in group 4.The number of energy levels of zirconium is 5, and I know this because it is located in family five. Families are the rows across on the periodic table.
If you take iron, its atomic number is 26, which means that a neutral iron atom has 26 electrons. Orbital & bonding info: Iron's outermost shell is the n=4 shell, the 2 electrons that occupy it being located in the 4s subshell. These two electrons are iron's valence electrons.
Scandium Z=21 has an electronic configuration [Ar] 4s 3d . Both the 4s and 3d electrons are easily mobilized into bonding, so we can conclude that scandim has three valence electrons.
Carbon (C) is the least electronegative atom in the CO2 Lewis structure and therefore should be placed at the center of the structure. The Lewis structure for CO2 has a total of 16 valence electrons. In order to complete the octets for all of the atoms in the structure you will need to form two double bonds.