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Which statement describes the formation of a covalent molecule?
A) an atom of an element with atomic number 12 reacts with one oxygen atom
B) an atom of an element with atomic number 8 reacts with two hydrogen atoms
C) an atom of an element with atomic number 20 reacts with two fluorine atoms
D) two atoms of an element with atomic number 11 react with one sulfur atom

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BlueSky06
The situation that could be best attributed to a covalent molecule would be the second choice which is "an atom of an element with atomic number 8 reacts with two hydrogen atoms." In addition, covalent bonding usually follows the Octet Rule as electrons are shared between elements.
debmagnani

Answer:

B) an atom of an element with atomic number 8 reacts with two hydrogen atoms

Explanation:

A covalent bond is formed when two atoms share pairs of electrons. In a covalent bond, stability comes from the electrostatic attraction between the positively charged atomic nuclei and the negatively charged electrons shared between them.

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