the condition for covalent bond is that both has to be non metal so that they can share their valence electrons to form duplet or octet configuration
...both electrons in the covalent bond are supplied by the same atom.
a polar covalent bond
by sharing of valence electrons
An ion
Shared electrons produce a covalent bond.
The type of formation for a covalent bond is 2s+3p+2s+4d
covalent bonds
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...both electrons in the covalent bond are supplied by the same atom.
covalent bonds can be broken if energy is added to a molecule. this formation of covalent bond is accompanied by energy given off.
a polar covalent bond
by sharing of valence electrons
An ion
Shared electrons produce a covalent bond.
formation of a covalent bond
DNA ligase
Ligase.