21 Facts on Cu, Cu2+ Lewis Structure, Characteristics

Cu2+ Lewis structure is highly motivating fact to illustrate the chemical overview on the element cupper. There is some knowledgeable facts supports sketch of Lewis structure rather electronic configuration of Copper.

The facts that would be discussed in this article are:

Drawing Cu Lewis structure

Drawing of Lewis structure involves few steps for every element in the periodic table. Those steps make the sketch of elements intense and specified with internal matters happens through electronic configuration of the element.

Cu Lewis structure from Wikipedia

While demonstrating the first step of identifying the number of valence electron in Copper this can be recognised from the electronic configuration that is for Cu is 1s22s22p63s23p64s23d104s1. It means the number valence electron in Copper is 9.

Next step is to put dots as the notation of electrons around Cu that is 9 dots. This step completes the simple Lewis structure of Copper that is significantly comparative in accordance with the Lewis structure of Cu2+.

Drawing Cu2+ Lewis structure

Studying about a strong cation Cu2+ in chemistry and its significance can be initiated with the preliminary drawing of Lewis structure of this ion. Cu2+ is named as cupric ion in chemical study.

Inputting valence electron as dots around copper after leaving two electron from its valence shell is the main perspective shared by Lewis structure of Cu2+. Lewis structure of cupric ion refers to the fact of electron deficiency in Copper.

Cu2+ Lewis structure resonance

Resonance means altering of bonds by electrons. Resonance is a mechanism which elaborates the significance of having pi bond in the structure. In resonance the pi bond is replaced by negative charge of any one atom of respective elements. Therefore, it is obvious that having a pi bond is the most required feature of resonance.

Cu2+ is definitely a positively charged ion but it denotes the deficiency of two electrons in its electronic structure. Therefore, after creating bon d with other elements it cannot initiates resonance. Resonance is irrelevant mechanism to proceed for cupric ion.

Cu2+ Lewis structure shape

The shape is important to determine from the Lewis structure of t elements or ions. Lewis electronic structure relevantly represents the shape or geometry of the compounds  or  periodic elements.

In Cu2+ the number of electron changes and it is formed in the shape of distorted  octahedral or square-pyramidal for cupric ion. Lewis structure plays a significant role in determining this change in shape for this ion with chemical demonstration.

Cu2+ Lewis structure formal charge

Formal charge of can be determined fie any compound by calculating the number of bonding and non-binding electrons in each of the elements participate in the formation of the compound.

In the case of a specific element of an ion it becomes important to observe the number of electrons it is releasing from its valence shell which identifies the entire formal charge of the ion. For cupric ion the formal charge is very precisely 2+.

Cu2+ Lewis structure angle

Lewis structure is responsible for expressing the angular dimensions of compounds which creates covalent of ionic bond by electron sharing. Angle of the compounds depends of several features such as types of bond and the presence of lone pairs.

Cu2+ is a ion which has no bond and it is formed from an angle periodic element that is copper. Therefore, the angle of this element is undefined.

Cu2+ Lewis structure octet rule

Octet rule refers to the chemical rules, which drives the periodic elements to reach out with eight electrons in its valence shell to get ultimate stability. It is the rules which initiates the process of bonding in chemistry to make the elements stable by getting similar electronic configuration like its nearest noble gas.

Cu2+ lewis structure
Electronic configuration of CU2 and Cu2+ to Identify Cu2+ Lewis structure from Wikipedia

For Cu, its nearest noble gas in periodic table is Argon that has electronic configuration as 3s23p6. Cupric ion has a tendency to gain two electrons to get back the structure of Copper. It reduces its oxidation state and this is how it gets stability without prioritising octet rule much. 

Otherwise, Cu can get eight electrons in its last energy level to fulfil octet rule but Cu3+ is not possible due to the extreme stability gain by fulfilling g d orbital. 3d10 orbital of Copper makes its different from octet stabilisation.

Cu2+ Lewis structure lone pairs

Presence of lobe pairs is detected by the Leis electronic structure of the elements. Presence lone pairs and its number are important to know its impact on electron exchange process.

Cu2+ is a complex ion and complex ions use to possess active number of lone pairs at its outermost energy level. When Cu2+ combines with other elements having negative changes, it highlights its coordination number instead of presenting lone pairs. However, the ion holds one unpaired electron in 4s orbital.

Cu2+ valence electrons

Valence electron identification is the most important job to do before sketching Lewis structure of any element, the number of valence electrons can be obtained in Copper as 2.

After eliminating two electrons the element becomes a complex ion which exceeds two valence electrons as well. The ions named as cupric ion holds 1 valence electron in its last energy shell.

Cu2+ hybridization

Hybridisation is another simple fact about the elements that is determined from the existence of electrons in the orbitals. After creating binds with other elements these orbitals over loops and electronic shift amid orbitals, takes place, which is denoted by Lewis structure.

Cu2+ has 9 electrons in d orbitals which is almost filled with the deficiency of 1 electron. However, the ion is noticed to form sp3 hybridisation after bonding with NH3 that donates a lone pair to cupric ion.

Cu2+ solubility

Solubility is water or other solutions depends on the charge of elements. Strong ionic elements of compounds have lower dissolving power in water.

Cupric ion is insoluble in water but it gets dissolved in strong hydrochloric acid. in hydrochloric acid the formation of complex ion becomes easier.

Cu2+ ionic

The power holding charges is the definite fact regarding identification of a element as ionic or covalent.

Cu2+ is the ionic state of metal Copper. After releasing two electrons from valence shell, the metal forms positively charged cupric ion.

Cu2+ acidic or basic

Lewis acid refers to those elements, which accepts electron with feasible nature, and Lewis base is those elements which donates electrons superiorly to the needy elements.

Cu2+ has ben identified as a strong electron acceptor. Therefore, this element is considered as a powerful Lewis acid is the series.

Cu2+ polar or nonpolar

Polarity depends on the bonding ability of the elements. Carrying charges giving rise to polarity in the periodic elements.

Cu2+ is positively charged ion, the charge give its topographical polar surface area. The value of this type of polarity in Cu2+ is 0 Ų.

Cu2+ tetrahedral

Tetrahedral shape is common is sp3 hybridised element of compounds.

Square pyramidal shape of Cu2+ from Wikipedia

Cu2+ has distorted octahedral shape with deficiency of two electrons. Otherwise the shape of Cu2+can be defined as square pyramidal as well. Octahedral geometry papers due to the presence of unpaired electrons. As Cu2+ has, one unpaired electron in its electronic geometry possesses this kind of shape.

Cu2+ linear

Octahedral shapes refers to the non-linear structure of compounds, extremely complex structure signifies the present on non-linear orbitals.

Cu2+ is complex ion that is holding distorted octahedral shape. Therefore, it is clarified that it has no linear structure. However, the element is non-linear in chemistry.

Cu2+ symmetrical or asymmetrical

Symmetric structure is held by the elements, which are identical by every side whereas asymmetric structure denotes that the elements are not looking same from each side.

Cu2+  is holding a symmetric geometry as its structure is argued as a square planner structure.

Cu2+ paramagnetic or diamagnetic

The presence of unpaired electrons in an element defines the magnetic structure of that element as paramagnetic. The definition of diamagnetic is vice versa that is when all the electrons in an element is paired then it is called diamagnetic.

Cupric ion has one unpaired elections therefore specifically it is a paramagnetic element. It is obvious that it cannot be called diamagnetic at all.

Cu2+ colour

Transition of electrons from one energy level to another energy level is the main mechanism that indicts the change in colour of elements. Besides, the presence of unpaired electrons is also influential factor to represent the colour of elements.

After releasing one electron Cu becomes Cu+ with filled d orbital that is d10 therefore; it is colourless. When Cu+ releases one mire electron, it becomes coloured due to presence of one unpaired electron that makes the transition feasible. Cu2+ is blue in colour.

Cu2+ a reducing agent

Reducing agent refers to those elements that can donate electrons to otgher needy elements. Therefore, reduction is possible only among thme who have excess electrons in valence shell.

It is clear that cupric ion has deficiency of two electrons therefore; it cannot be an electron donor. Besides, this ion can adopt electrons easily with string bonding with other elements such as Ammonia.

Cu2+ an oxidizing agent

Oxidation state of cupric ion is notable fact, which describes its stability. After reducing two electrons from valence shell Copper gives rise to this complex ion which impose a relevant oxidation state to create coordination with other periodic elements.

Oxidation and reduction state of Copper from Wikipedia

Cu2+ is one of the strongest oxidising agents. Aluminium is another strong oxidising agent but not stronger than cupric ion. Therefore cupric ion can oxide Al but Al cannot oxidise it. The 2+ oxidation state held by the ion is more stable in chemical matters than 1+. Therefore, Cu2+ is considered as a stable and powerful oxidising agent.

Stability of Cu2+

Stability of ions can be identified by examining the ability of making binds with water molecules. In a simpler language, hydration energy of the ions determines the stability of the ions.

Cupric ion is a strong ion with high charge density that releases a huge amount of energy and makes string binds with other elements. Therefore, this ion is considered as a stable ion in chemistry.


This article has illustrated the more than enough facts regarding the complex ion Cu2+ which has been found to be named as cupric ion in chemistry. After eliminating two electrons from valence shell, Copper emphasises the formation of this ion.

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