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

$$\mathrm{Ne} \u003c \mathrm{F^-} \u003c \mathrm{O$$^{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

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