Covalent Bonding — Quiz

Question 7 • Chemistry

Which structure shows the correct electron arrangement in CCl sub 4 ?

Answer

Image with description A central upper C is single bonded to upper H above, below, and to the left, and single-bonded to upper C l to the right. The C l has three pairs of electron dots, above, right, and below.

Image with description A central upper C is single bonded to upper C l above, right, left, and below. All the C l atoms have 3 pair of electron dots, on the three sides that do not have the bond.

Image with description A central upper C is single bonded to upper C l to the top, bottom, and left; those upper C l atoms have three pairs of electron dots on the sides away from the bond. The C is also single bonded to an upper H to the right.

Image with description A central upper C is single bonded to upper H above and below, and to upper C l to the left and right. The C l have three pairs of dots, above, below, and to the side opposite the bond.

Explanation

Carbon has 4 valence electrons and forms four single bonds in CCl₄, one to each chlorine atom. Each chlorine has 7 valence electrons; after forming one bond, it has three lone pairs. Choice B shows a central carbon bonded to four chlorine atoms, with three pairs of dots on each chlorine.

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