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Why would two atoms form a covalent bond instead of an ionic bond?

Both atoms in a bond have similar electronegativity; thus, neither atom is willing to transfer their electrons. Instead, the atoms both share electrons to satisfy the octet rule.
Both atoms of the bond are metals, so neither can transfer electrons. Instead, the atoms share valence electrons in a free-moving sea of electrons.
One atom is a metal and the other a nonmetal, meaning there is a difference in electronegativity; thus, the atoms will transfer electrons. Each atom forms an ion to satisfy the octet rule.
The type of bond that is formed is based on the amount of energy that is supplied to excite the valence electrons. Thus, it would depend on the environment, not the atoms, involved.

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Answer:

The correct answer is both atom in a bond have similar electronegativity thus neither atom is willing to transfer their electrons.Instead the atoms both share electrons to satisfy the octet rule.

Explanation:

Two atoms participate in the formation of covalent bond whose electronegativity is similar.

       Both atoms donate equal number of electron to form  electron pair which is shared equally by the two atoms to satisfy the octet rule.

     Covalent bond formation occur by sharing and pairing of electrons .

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