Question

Which statement describes how a covalent molecule would be formed?
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

Answer 1

B) explains it. Because when an atom of element of atomic no. 8(2,6) reacts with two hydrogen atoms each having 1 valence electron share electrons. 1+1 valance electron of 2 hydrogen atoms and 1 of the former element with each hydrogen atom is shared.

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Answer 2

Answer:

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

Explanation:

A covalent bond is formed by sharing electrons. An atom of an element with atomic number 8 has two valence electrons. A hydrogen atom has one valence electron. So an atom of an element with atomic number 8 reacts with two hydrogen atoms.