Question 1

Which type of atomic orbital is represented by the image provided?

Accepted Answer

s orbital

Question 2

Which equation correctly relates the speed ($$c$$), wavelength ($$\lambda$$), and frequency ($$
u) of $$light?

Accepted Answer

$$c = \lambda 
u$$

Question 3

Which quantum number describes the orientation of an orbital in space?

Accepted Answer

Magnetic quantum number ($$m_l)$$

Question 4

Which of the following elements has the highest electronegativity?

Accepted Answer

Fluorine (F)

Question 5

What is the electron configuration for the oxide ion ($$O^{2-}) $$using the noble gas core abbreviation?

Accepted Answer

$$[He] 2s^2$ 2p^6$

Question 6

Which of the following molecules is nonpolar, given its Lewis structure and molecular geometry?

Accepted Answer

CO$$_2$$

Question 7

Which statement best describes the trend in atomic size across a period from left to right?

Accepted Answer

Atomic size decreases due to increased nuclear charge.

Question 8

A photon has a wavelength of $$4.00 	imes 10$$^{-7}$$ m. What is its energy? (c = 3.00$$ 	imes $$10^8 m/s$$, $$h = 6.63 	imes 10$$^{-34}$$ J·s)

Accepted Answer

$$4.97 	imes 10$$^{-19}$$ J

Question 9

Which of the following best explains why the Bohr model was important in the development of atomic theory?

Accepted Answer

It explained atomic emission spectra using quantized energy levels.

Question 10

Which of the following Lewis structures represents a resonance structure?

Accepted Answer

O$$_3$$

Question 11

Which molecule has a trigonal planar shape according to VSEPR theory?

Accepted Answer

BF$$_3$$

Question 12

Which of the following ions has the same electron configuration as neon?

Accepted Answer

Na$$^+$$

Question 13

Which quantum number is responsible for determining the shape of an orbital?

Accepted Answer

Azimuthal quantum number ($$l)$$

Question 14

Which of the following best describes the trend in ionization energy down a group in the periodic table?

Accepted Answer

Ionization energy decreases due to increased atomic radius.

Question 15

Which of the following best describes the metallic character trend in the periodic table?

Accepted Answer

Metallic character decreases from left to right across a period.

Question 16

Which of the following molecules is polar due to its shape and bond polarity?

Accepted Answer

NH$$_3$$

Question 17

What is the frequency ($$
u) of $$light with a wavelength ($$\lambda) of$$ $$5.00 	imes 10$$^{-7}$$ m? (c = 3.00$$ 	imes $$10^8 m/s)$$

Accepted Answer

$$6.00 	imes 10$$^{14}$$ Hz

Question 18

Which of the following is the correct electron configuration for a neutral phosphorus atom (P, atomic number 15) using the noble gas core abbreviation?

Accepted Answer

$$[Ne] 3s^2$ 3p^3$

Question 19

Which of the following best explains why O$$_2 is $$paramagnetic?

Accepted Answer

It has unpaired electrons in its molecular orbitals.

Question 20

Which of the following statements about electron affinity is correct?

Accepted Answer

Electron affinity increases across a period from left to right.

Atomic Structure, Light, and Chemical Bonding: Study Guide for Introductory Chemistry

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