usulally they are shared and are localised around the 2 atoms being bonded. In 3 center 2 electron bonds as in B2H6 they are across 3 atoms. Also there are delocalised covalent bonds , delocalised across more than two atoms- examples graphite, benzene.
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In a covalent bond, electrons are shared between atoms to achieve a stable electron configuration. Each atom contributes one or more electrons to the shared pair, leading to the formation of a shared electron cloud that encompasses both atoms. This sharing allows both atoms to achieve a full outer shell of electrons, making the bond stable.
A covalent bond is when elements share electrons evenly, so that they can help each other obtain eight valence electrons.
The type of bond in which two atoms share electrons is called a covalent bond.
When atoms share electrons, they form a chemical bond, or covalent bond.
A covalent bond is formed when two atoms share one or more pairs of valence electrons. In this type of bond, the shared electrons move between the nuclei of the atoms, creating a stable arrangement and holding the atoms together.
A covalent bond is a type of bond in which atoms share electrons. This sharing of electrons allows each atom to achieve a full outer electron shell and become more stable. Covalent bonds are typically found in molecules composed of nonmetals.
When two atoms combine by sharing electrons, it forms a covalent bond. In an ionic bond, one atom transfers electrons to another, leading to the formation of oppositely charged ions that are attracted to each other.