Why does CL show variable valency?
For chlorine, it has 7 electron in its outermost orbit. If it gains one electron, then it will acquire stable configuration like that of Argon. That is why, chlorine tends to gain one electron from other combining atoms, and hence its valency is 1.
Why does fluorine not show variable valency?
non availability of vacant d-orbitals. Fluorine has no vacant d-orbitals so no electron excitation is possible and so it does not exhibit variable oxidation states.
Is chlorine variable valency?
The electronic configuration of chlorine is [Ne]3s2 3p5or can also be written as 2,8,7. This shows chlorine has 7 valence electrons in its outermost shell. Accordingly, the valency of chlorine is 7-8 which is 1.
What is the valency of fluorine and why?
The valency of fluorine is seven. This means that the outer electron shell of a fluorine atom contains seven electrons.
Which element does not show variable valency?
Sodium, calcium, and magnesium belong to the s-group so they do not show variable valency.
Why Sulphur has variable valency?
Sulphur comes in 3rd period of the periodic table and it contains s,p and d orbital only. In the ground state, the d orbital remains empty, when excitation occurs there is jumping of paired electrons to the d orbital and therefore they show an increase in valency or variable valency.
Do F block elements show variable valency?
So the electrons from both the energy levels can be used for bonding. Similarly, inner transition elements show variable valency due to incomplete filling of f-orbitals.
Why does fluorine only show oxidation state?
The fluorine atom has no d-orbitals in its valence shell and therefore, cannot expand its octet. Thus, fluorine is the most electronegative exhibit –1 oxidation state only. This is because they are less electronegative than F and possess empty d-orbitals in the valence shell and therefore, can expand the octet.
Why chlorine is written as Cl2?
Chlorine is called Cl2 because it is a diatomic molecule. Diatomic means there are two atoms of the same elements in the molecule. There are other diatomic molecule, such as hydrogen (H2), nitrogen (N2), oxygen (O2), fluorine (F2), chlorine (Cl2), bromine (Br2), iodine (I2).
What is the valency of fluorine in caf2?
Valency of fluorine in CaF2 is -1.
What is valency of fluorine in caf2?
Solution. Valency of fluorine in CaF2 is -1.
What is its valence electron of fluorine?
[He] 2s2 2p5
Fluorine/Electron configuration
Why fluorine does not show variable valency while other halogens do?
Why fluorine does not show variable valency while other halogens show variable valency? Fluorine is the most electronegative element and cannot exhibit any positive oxidation state. Other halogens have d orbitals and therefore, can expand their octets and show + 1, + 3, + 5 and + 7 oxidation states also.
What is the valency of fluorine atom with 7 electrons?
The fluorine atom has 7 electrons in the outermost shell and its valency could be 7. But it is easier for fluorine to gain one electron instead of losing seven electrons. Hence, its valency is determined by subtracting seven electrons from the octet and this gives you a valency of one for fluorine. Answer verified by Toppr
What is the valency of chlorine?
Valency is defined as the combining capacity of atoms or molecules. It is obtained from the number of electrons present in the outermost shell of an atom. The atomic number of chlorine is 17 and the electronic configuration is 2, 8, 7. Therefore, the valency of chlorine is 1.
Why do some elements have variable valence electrons?
The electrons which are present in an atom’s outermost shell are called valence electrons. So one or more electrons from the core’s outermost shell may also be lost after the removal of valence electrons. Such elements therefore indicate two or more different valencies i.e. they have variable valentia.