Question 1

Which region of the electromagnetic spectrum has the highest energy per photon?

Accepted Answer

Gamma rays

Question 2

A firework emits red light at 650 nm due to the presence of Sr(NO$$_3$$)$$_2. $$What is the energy of one photon of this light? (Use $$h = 6.626 	imes 10$$^{-34}$$ J·s, c = 3.00$$ 	imes $$10^8 m/s)$$

Accepted Answer

$$3.06 	imes 10$$^{-19}$$ J

Question 3

Which of the following best describes the difference between an absorption spectrum and an emission spectrum?

Accepted Answer

Absorption spectrum shows dark lines on a colored background, emission spectrum shows colored lines on a dark background.

Question 4

Using the Rydberg formula $$\frac{1}{\lambda} = R_H \left( \frac{1}{n_1$^2} - \frac{1}{n_2$^2} ight)$$ with $$R_H = 1.097 	imes 10^7$ m$$^{-1}$$, what is the wavelength (in nm) of the Balmer series emission line for a transition from n_2$ = 6 to$$ $$n_1 = 2$?

Accepted Answer

410 nm

Question 5

Which quantum number determines the shape of an atomic orbital?

Accepted Answer

Azimuthal quantum number ($$l)$$

Question 6

How many possible orientations does a d-orbital have in space?

Accepted Answer

5

Question 7

Which of the following electron configurations is correct for copper (Cu, atomic number 29) based on experimental evidence?

Accepted Answer

[Ar] 4s$$^1 3d$^{10}$$

Question 8

Which of the following molecules is nonpolar due to its molecular geometry?

Accepted Answer

CO$$_2$$

Question 9

What is the hybridization of the central atom in a molecule with a tetrahedral geometry?

Accepted Answer

sp$$^3$$

Question 10

Which type of intermolecular force is strongest in NaCl(s)?

Accepted Answer

Ion-ion interactions

Question 11

A molecule has 5 regions of electron density and no lone pairs on the central atom. What is its molecular geometry and hybridization?

Accepted Answer

Trigonal bipyramidal, sp$$^3d$$

Question 12

Which of the following statements about sigma ($$\sigma) $$and pi ($$\pi) $$bonds is correct?

Accepted Answer

A single bond consists of one sigma bond.

Question 13

Which of the following is the correct order of increasing boiling points for the following substances: H$$_2$$, H$$_2O$$, NaCl?

Accepted Answer

H$$_2$$ \u003c H$$_2O$$ \u003c NaCl

Question 14

Which of the following best explains why water (H$$_2O) $$has a higher boiling point than hydrogen sulfide (H$$_2S$$)?

Accepted Answer

Water forms hydrogen bonds, while H$$_2S $$does not.

Question 15

Which of the following is the correct name for the complex ion [Fe(CN)$$_6$$]$$^{4-}$$?

Accepted Answer

Hexacyanoferrate(II) ion

Question 16

Which of the following transitions in the hydrogen atom emits a photon with the highest energy?

Accepted Answer

$$n=2 to$$ $$n=1$$

Question 17

Which of the following best describes the effect of increasing the strength of a ligand in an octahedral complex on the crystal field splitting energy ($$\Delta$$)?

Accepted Answer

$$\Delta$$ increases

Question 18

Which of the following is the correct empirical formula for a crystal structure with 8 corner atoms and 1 atom at the center of the cube?

Accepted Answer

AB

Question 19

Which of the following phase changes is exothermic?

Accepted Answer

Condensation

Atomic Spectra, Quantum Numbers, and Electron Configuration Study Guide

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