Respuesta :
Answer:
The statements which are indicative of a covalent bond are as follows -:
- Electron movement is concentrated somewhere between the two bonded nuclei.
- The greatest probability of finding the shared electrons is in the area of orbital overlap.
- The valence electrons involved in the bond are moving solely around the nucleus of the atom with the higher electron affinity.
Explanation:
Among the given four statements, three statements are correct, the statement- "Electron density is focused on one element in the bond, generally resulting in the formation of a crystalline substance." is incorrect as In ionic bonds, crystalline formation takes place.
- Somewhere between the two bonded nuclei, electron movement is centered. --: Covalent bonds are a class of chemical bonds in which valence electrons are shared between two atoms, typically two non-metals. The formation of a covalent bond helps the non-metals to obey the octet 's law and thus become more stable.
- The greatest probability of finding the shared electrons is in the area of orbital overlap.-: A pi bond (π bond) is a type of covalent bond arising from the overlap of two p orbitals side by side.
- The valence electrons involved in the bond are moving solely around the nucleus of the atom with the higher electron affinity.- : As pairs of electrons are exchanged by atoms, covalent bonding happens. In order to achieve further stability, which is gained by forming a complete electron shell, atoms can covalently bond with other atoms. Atoms can fill their outer electron shell and achieve stability by exchanging their outermost (valence) electrons.
- Hence , the correct option is D (I,II and IV )
