$\mathrm{Ne} < \mathrm{F^-} < \mathrm{O^{2-}}$

$\mathrm{CO_2}$ has polar bonds but a linear geometry, so the dipoles cancel; $\mathrm{H_2O}$ has a bent geometry, so the dipoles do not cancel.

$\mathrm{CH_4}$ has a larger bond angle because it has no lone pairs on the central atom.

Question 1

How many subshells are present in the $n=4$ shell?

Accepted Answer

4

Question 2

Which of the following is NOT a valid atomic orbital?

Accepted Answer

$3f$

Question 3

What is the maximum number of electrons that can occupy the $f$ subshell?

Accepted Answer

14

Question 4

What is the lowest principal quantum number $n$ that can have an $f$ subshell?

Accepted Answer

$n=4$

Question 5

Compare the size of a sodium atom ($\mathrm{Na}$) and a sodium ion ($\mathrm{Na^+}$). Which is larger and why?

Accepted Answer

$\mathrm{Na}$ is larger because it has more electrons.

Question 6

Which atom is larger: $\mathrm{Cl}$ or $\mathrm{Br}$?

Accepted Answer

$\mathrm{Br}$

Question 7

Arrange the following in order of increasing atomic size: $\mathrm{O^{2-}}$, $\mathrm{F^-}$, $\mathrm{Ne}$.

Accepted Answer

$\mathrm{Ne} < \mathrm{F^-} < \mathrm{O^{2-}}$

Question 8

Which element has the smallest atomic radius?

Accepted Answer

$\mathrm{Ne}$

Question 9

Which of the following molecules is nonpolar?

Accepted Answer

$\mathrm{CO_2}$

Question 10

Which of the following bonds is the most polar?

Accepted Answer

$\mathrm{H-F}$

Question 11

Why is $\mathrm{CO_2}$ nonpolar but $\mathrm{H_2O}$ is polar?

Accepted Answer

$\mathrm{CO_2}$ has polar bonds but a linear geometry, so the dipoles cancel; $\mathrm{H_2O}$ has a bent geometry, so the dipoles do not cancel.

Question 12

Predict the molecular geometry of the ammonium ion ($\mathrm{NH_4^+}$).

Accepted Answer

Tetrahedral

Question 13

What is the electron geometry of $\mathrm{CH_2O}$ (formaldehyde)?

Accepted Answer

Tetrahedral

Question 14

Draw the Lewis structure for $\mathrm{SO_3}$. What is its molecular geometry?

Accepted Answer

Trigonal planar

Question 15

Compare the bond angles in $\mathrm{NH_3}$ and $\mathrm{CH_4}$. Which has the larger bond angle and why?

Accepted Answer

$\mathrm{CH_4}$ has a larger bond angle because it has no lone pairs on the central atom.

Question 16

What is the correct formula for iron (III) sulfate?

Accepted Answer

$\mathrm{Fe_2(SO_4)_3}$

Question 17

What is the name of the compound $\mathrm{K_2Cr_2O_7}$?

Accepted Answer

Potassium dichromate

Question 18

What is the formula for ammonium hydroxide?

Accepted Answer

$\mathrm{NH_4OH}$

Question 19

What is the correct name for $\mathrm{SnCl_4}$?

Accepted Answer

Tin(IV) chloride

Question 20

Which of the following is the correct noble gas electron configuration for iodine ($Z=53$)?

Accepted Answer

$[Kr] 5s^2 4d^{10} 5p^5$

General Chemistry II: Atomic Structure, Periodic Trends, Bonding, Geometry, Nomenclature, and Electron Configurations – Study Guide & Practice Problems

Study Guide - Practice Questions