QUESTION
A carbon atom is able to form four single covalent bonds because it
A) has four electrons and four protons.
B) has four valence electrons in its outermost energy level.
C) forms a polyatomic ion with a -4 charge.
D) forms a more stable isotope when it gains four more electrons.

From the electronic configuration we conclude that there are four number of valence electrons present in outermost energy level of carbon atom that means carbon atom has ability to form four single covalent bonds to another atom.

Hence, the correct option is, (B)

QUESTION A carbon atom is able to form four single covalent bonds because it A) has four electrons and four protons. B) has four valence electrons in its outermost energy level. C) forms a polyatomic ion with a -4 charge. D) forms a more stable isotope when it gains four more electrons.

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QUESTION
A carbon atom is able to form four single covalent bonds because it
A) has four electrons and four protons.
B) has four valence electrons in its outermost energy level.
C) forms a polyatomic ion with a -4 charge.
D) forms a more stable isotope when it gains four more electrons.