LIFE SCIENCE

Detailed explanation-1: -A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.

Detailed explanation-2: -The bond formed when atoms share electrons is called a covalent bond. (Unlike ionic bonds, which involve the complete transfer of electrons). A group of atoms held together by covalent bonds is called a molecule.

Detailed explanation-3: -A covalent bond is the force of attraction that holds together two atoms that share a pair of valence electrons. The shared electrons are attracted to the nuclei of both atoms.

Detailed explanation-4: -A covalent bond forms when two non-metal atoms share a pair of electrons . The electrons involved are in the outer shells of the atoms. An atom that shares one or more of its electrons will complete its outer shell.

Detailed explanation-5: -A molecule is a neutral group of atoms joined by covalent bonds. By sharing 2 electrons in a covalent bond, each atom gains a stable set of 8 valence electrons.