Question 1

Quantum mechanics predicts that in the hydrogen atom, all orbitals with the same value of n (e.g., the three 2p orbitals) are degenerate, meaning:

Accepted Answer

A)  that they have similar looking shapes. 
B)  that they are similarly oriented in space. 
C)  that they have the same frequency. 
D)  that they have the same wavelength. 
E)  that they have the same energy. 
A)  that they have similar looking shapes. 
B)  that they are similarly oriented in space. 
C)  that they have the same frequency. 
D)  that they have the same wavelength. 
E)  that they have the same energy. E

Question 2

Which of the following shows the arrangement of electrons in beryllium (Z = 4)? (s, p, d, f represent the sub shells and the superscript represents the number of atoms in the subshell.)

Accepted Answer

A)  1s12s21p1 
B)  1s12s13p1 
C)  1s22s1 
D)  1s22s2 
E)  1s02s13p2 
A)  1s12s21p1 
B)  1s12s13p1 
C)  1s22s1 
D)  1s22s2 
E)  1s02s13p2 D

Question 3

According to the Niels Bohr's model of atom, the orbits of electrons are determined purely by the electrostatic forces within the atom.

Accepted Answer

A) True 
 B)False  False

Question 4

A standing circular wave has a circumference of 2.734 units. Which of the following wavelengths would cause destructive interference of the wave?

Accepted Answer

A)  2.734 units 
B)  5.468 units 
C)  8.202 units 
D)  12.303 units 
E)  21.872 units 
A)  2.734 units 
B)  5.468 units 
C)  8.202 units 
D)  12.303 units 
E)  21.872 units

Question 5

All forms of electromagnetic radiation have the same speed of transmission.

Accepted Answer

A) True 
 B)False

Question 6

Max Planck proposed that the energy of electromagnetic waves is continuous rather than quantized.

Accepted Answer

A) True 
 B)False

Question 7

The wavelength of a tennis ball weighing 70.0 g and travelling at a speed of 40.0 miles/hour is _____.

Accepted Answer

A)  6.63 × 1034 m 
B)  1.252 × 1034 m 
C)  5.29 × 10-34 m 
D)  0.371 × 10-34 m 
E)  9.46 × 10-34 m 
A)  6.63 × 1034 m 
B)  1.252 × 1034 m 
C)  5.29 × 10-34 m 
D)  0.371 × 10-34 m 
E)  9.46 × 10-34 m

Question 8

The unit of the Planck's constant is _____.

Accepted Answer

The answer of The unit of the Planck's constant is...

Question 9

A 3px orbital will have the same shape, size, and energy level as the _____ orbital.

Accepted Answer

A)  2s 
B)  3s 
C)  3py 
D)  4px 
E)  4py 
A)  2s 
B)  3s 
C)  3py 
D)  4px 
E)  4py

Question 10

Explain Einstein's hypothesis to explain the photo electric effect.

Accepted Answer

The key feature of Einstein's hypothesis

Question 11

A(n)_____ is the point at which the amplitude of the wave is zero.

Accepted Answer

A)  overtone 
B)  node 
C)  standing wave 
D)  fundamental point 
E)  still zone 
A)  overtone 
B)  node 
C)  standing wave 
D)  fundamental point 
E)  still zone

Question 12

If the position of a particle is known absolutely, then the uncertainty in the momentum of the particle must be _____.

Accepted Answer

A)  equal to its mass 
B)  equal to the Planck's constant 
C)  infinite 
D)  equal to the velocity of the particle 
E)  zero 
A)  equal to its mass 
B)  equal to the Planck's constant 
C)  infinite 
D)  equal to the velocity of the particle 
E)  zero

Question 13

Two electrons occupying the same orbital have opposite spins.

Accepted Answer

A) True 
 B)False

Question 14

A(n) _____ spectrum is a spectrum produced by the emission of light by atoms in excited states.

Accepted Answer

The answer of A(n) _____ spectrum is a spectrum produced...

Question 15

What is the electron configuration of tin (Z = 50)?

Accepted Answer

A)  [Xe]5s24d2 
B)  [Ar]5s24d2 
C)  [Xe]5s24d8 
D)  [Kr]5s24d105p2 
E)  [Kr]5s24d105p6 
A)  [Xe]5s24d2 
B)  [Ar]5s24d2 
C)  [Xe]5s24d8 
D)  [Kr]5s24d105p2 
E)  [Kr]5s24d105p6

Question 16

The _____ state is the most stable arrangement of electrons for an element or a compound.

Accepted Answer

The answer of The _____ state is the most stable...

Question 17

The wavelength of radiation emitted by a substance is dependant on its composition.

Accepted Answer

A) True 
 B)False

Question 18

What is the wavelength of a neutron (1.675 × 10-27 kg) that is moving at 1.400 × 10-7 m/s?

Accepted Answer

A)  3.96 × 107 m 
B)  7.98 × 10-7 m 
C)  2.83 m 
D)  4.00 m 
E)  4.50 × 10-7 m 
A)  3.96 × 107 m 
B)  7.98 × 10-7 m 
C)  2.83 m 
D)  4.00 m 
E)  4.50 × 10-7 m

Question 19

Write a note on the electromagnetic radiation and the electromagnetic spectrum.

Accepted Answer

Energy that is transmitted, or radiated,

Question 20

A photon is a quantum of radiant energy possessing a particular energy.

Accepted Answer

A) True 
 B)False

Exam 6: The Structure of Atoms

Quantum mechanics predicts that in the hydrogen atom, all orbitals with the same value of n (e.g., the three 2p orbitals) are degenerate, meaning:

Which of the following shows the arrangement of electrons in beryllium (Z = 4)? (s, p, d, f represent the sub shells and the superscript represents the number of atoms in the subshell.)

According to the Niels Bohr's model of atom, the orbits of electrons are determined purely by the electrostatic forces within the atom.

A standing circular wave has a circumference of 2.734 units. Which of the following wavelengths would cause destructive interference of the wave?

All forms of electromagnetic radiation have the same speed of transmission.

Max Planck proposed that the energy of electromagnetic waves is continuous rather than quantized.

The wavelength of a tennis ball weighing 70.0 g and travelling at a speed of 40.0 miles/hour is _____.

The unit of the Planck's constant is _____.

A 3px orbital will have the same shape, size, and energy level as the _____ orbital.

Explain Einstein's hypothesis to explain the photo electric effect.

A(n)_____ is the point at which the amplitude of the wave is zero.

If the position of a particle is known absolutely, then the uncertainty in the momentum of the particle must be _____.

Two electrons occupying the same orbital have opposite spins.

A(n) _____ spectrum is a spectrum produced by the emission of light by atoms in excited states.

What is the electron configuration of tin (Z = 50)?

The _____ state is the most stable arrangement of electrons for an element or a compound.

The wavelength of radiation emitted by a substance is dependant on its composition.

What is the wavelength of a neutron (1.675 × 10-27 kg) that is moving at 1.400 × 10-7 m/s?

Write a note on the electromagnetic radiation and the electromagnetic spectrum.

A photon is a quantum of radiant energy possessing a particular energy.

Introduction to Chemistry

Molecules, Ions, and Chemical Formulas

Chemical Reactions

Reactions in Aqueous Solution

Energy Changes in Chemical Reactions

The Periodic Table and Periodic Trends

Ionic Versus Covalent Bonding

Molecular Geometry and Covalent Bonding Models

Gases

Liquids

Solids

Solutions

Chemical Kinetics

Chemical Equilibrium

Aqueous Acidbase Equilibriums

Solubility and Complexation Equilibriums

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Periodic Trends and the S-Block Elements

The P-Block Elements

The D-Block Elements

Organic Compounds

Filters

A 3p_x orbital will have the same shape, size, and energy level as the _____ orbital.

What is the wavelength of a neutron (1.675 × 10^-²⁷ kg) that is moving at 1.400 × 10^-⁷ m/s?