Question 1

How many total valence electrons are in $$\mathrm{$$CCl_4$$}$$?

Accepted Answer

$$32$$

Question 2

How many total valence electrons are in $$\mathrm{SO_2$}$$?

Accepted Answer

$$18$$

Question 3

How many total valence electrons are in $$\mathrm{CH_3O^-}$$?

Accepted Answer

$$16$$

Question 4

Which of the following best describes the molecular shape of $$\mathrm{SF_6$}$$?

Accepted Answer

Octahedral

Question 5

What is the molecular shape of $$\mathrm{$$XeF_4$$}$$?

Accepted Answer

Square planar

Question 6

What is the molecular shape of $$\mathrm{PF_5$}$$?

Accepted Answer

Trigonal bipyramidal

Question 7

In the correct Lewis dot structure for water, how many lone pair(s) of electrons does oxygen have?

Accepted Answer

2

Question 8

Which of the following best describes the hybridization of the central atom in $$\mathrm{NH_3$}$$?

Accepted Answer

$$sp^3$$

Question 9

How many sigma and pi bonds are present in the molecule $$\mathrm{CO_2$}$$?

Accepted Answer

2 sigma, 2 pi

Question 10

Are the C–Cl bonds in $$\mathrm{$$CCl_4$$}$$ polar covalent, nonpolar covalent, or ionic?

Accepted Answer

Polar covalent

Question 11

Is the $$\mathrm{$$CCl_4$$}$$ molecule polar or nonpolar?

Accepted Answer

Nonpolar

Question 12

Which of the following statements about the Lewis structure of $$\mathrm{NH_3$} is $$correct?

Accepted Answer

The nitrogen atom has one lone pair of electrons.

Question 13

What is the bond angle in $$\mathrm{CH_4$}$$ and what is the hybridization of the central atom?

Accepted Answer

Bond angle: $$109.5^\circ$$, Hybridization: $$sp^3$$

Question 14

Which of the following molecules has a lone pair on the central atom and a bent molecular geometry?

Accepted Answer

$$\mathrm{H_2O}$$

Question 15

Which of the following best describes the hybridization of the central atom in $$\mathrm{SF_6$}$$?

Accepted Answer

$$sp^3d^2$

Question 16

A student draws a Lewis structure for $$\mathrm{CO_2$}$$ with a single bond between C and each O, and three lone pairs on each O. What is wrong with this structure?

Accepted Answer

It does not satisfy the octet rule for carbon.

Question 17

Which of the following molecules is expected to have the largest bond angle?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 18

How many sigma and pi bonds are present in ethene ($$\mathrm{C_2H_4}$$)?

Accepted Answer

5 sigma, 1 pi

Question 19

Which of the following best describes the hybridization of the carbon atom in $$\mathrm{CO_2$}$$?

Accepted Answer

$$sp$$

Question 20

Which of the following molecules is nonpolar despite having polar bonds?

Accepted Answer

$$\mathrm{$$CCl_4$$}$$

Lewis Dot Structures, Molecular Shapes, and Hybridization Practice Guidance

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