Question 1

Which law states that energy cannot be created or destroyed, only transformed from one form to another?

Accepted Answer

Law of Conservation of Energy

Question 2

Which of the following best describes the wavelength of a wave?

Accepted Answer

The distance between two consecutive peaks

Question 3

What is the frequency of light with a wavelength of $4.95 	imes 10^{-7}$ m? (Speed of light $c = 2.998 	imes 10^8$ m/s)

Accepted Answer

$6.06 	imes 10^{14}$ Hz

Question 4

Which color of visible light has the longest wavelength?

Accepted Answer

Red

Question 5

What happens when an electron absorbs energy and jumps to a higher energy level?

Accepted Answer

The electron enters an excited state

Question 6

Which equation correctly relates the energy of a photon to its frequency?

Accepted Answer

$E = h 
u$

Question 7

If a photon has a frequency of $5.6 	imes 10^{14}$ Hz, what is its energy? ($h = 6.626 	imes 10^{-34}$ J·s)

Accepted Answer

$3.71 	imes 10^{-19}$ J

Question 8

Which scientist's model of the atom first included a dense, positively charged nucleus?

Accepted Answer

Rutherford

Question 9

Which of the following best describes the Pauli Exclusion Principle?

Accepted Answer

No two electrons in an atom can have the same set of quantum numbers

Question 10

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

Accepted Answer

Radio waves

Question 11

What is the electron configuration for phosphorus (P, atomic number 15)?

Accepted Answer

$1s^2 2s^2 2p^6 3s^2 3p^3$

Question 12

Which orbital is spherical in shape?

Accepted Answer

s orbital

Question 13

A green leaf appears green because it:

Accepted Answer

Reflects the wavelengths that make green

Question 14

Which transition in the hydrogen atom emits a photon in the ultraviolet region?

Accepted Answer

$n=3 \rightarrow n=1$

Question 15

Which of the following is the correct order of electromagnetic radiation from lowest to highest frequency?

Accepted Answer

Radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays

Question 16

What is the wavelength (in nm) of light with a frequency of $4.2 	imes 10^{14}$ Hz? ($c = 2.998 	imes 10^8$ m/s)

Accepted Answer

$714$ nm

Question 17

Which principle states that electrons fill the lowest energy orbitals first?

Accepted Answer

Aufbau Principle

Question 18

Which rule states that electrons fill degenerate orbitals singly before pairing up?

Accepted Answer

Hund's Rule

Question 19

Which scientist proposed that energy is quantized and can be emitted or absorbed only in discrete amounts?

Accepted Answer

Planck

Question 20

Which of the following electron configurations represents a noble gas?

Accepted Answer

$1s^2 2s^2 2p^6$

Quantum Mechanics, Atomic Structure, and Electromagnetic Radiation: Study Notes

Study Guide - Practice Questions