Question 1

Electromagnetic waves can only be transmitted in the Earth's atmosphere.

Accepted Answer

A) True 
 B)False

Question 2

What is the de Broglie wavelength of an electron traveling at a velocity of 4.53 × 106 m/s in a hydrogen atom? Given: Mass of an electron: 9.11 × 10-31 kilograms

Accepted Answer

A)  2.26 × 10-34 m 
B)  9.10 × 10-31 m 
C)  4.78 × 10-11 m 
D)  6.74 × 10-14 m 
E)  1.61 × 10-10 m 
A)  2.26 × 10-34 m 
B)  9.10 × 10-31 m 
C)  4.78 × 10-11 m 
D)  6.74 × 10-14 m 
E)  1.61 × 10-10 m

Question 3

Write a note on the blocks and the corresponding electronic configuration in the periodic table?

Accepted Answer

The two columns on the left, known as th

Question 4

The energy level in an atom corresponding to n=5 will have a total of 5 nodes.

Accepted Answer

A) True 
 B)False

Question 5

Lanthanum is a(n) _____ block element.

Accepted Answer

The answer of Lanthanum is a(n) _____ block element....

Question 6

How many unpaired electrons does fluorine contain?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 7

Explain the working of a laser with an example.

Accepted Answer

Ruby is an impure form of aluminum oxide

Question 8

The number of electrons that can be contained in a 4$d$ subshell is _____.

Accepted Answer

A)  2 
B)  4 
C)  6 
D)  8 
E)  10 
A)  2 
B)  4 
C)  6 
D)  8 
E)  10

Question 9

The Pfund series of lines are due to transitions from higher-energy orbits to orbits with n = 5.

Accepted Answer

A) True 
 B)False

Question 10

The number of electrons that can be contained in a 4$p$ subshell is _____.

Accepted Answer

A)  2 
B)  4 
C)  6 
D)  8 
E)  10 
A)  2 
B)  4 
C)  6 
D)  8 
E)  10

Question 11

When a pure sample of an individual element is heated (as in a discharge tube), a continuous spectrum of electromagnetic radiation is emitted by the sample.

Accepted Answer

A) True 
 B)False

Question 12

If a wave has a wavelength of 3256 m and a frequency of 9.180 × 104 s−1, its velocity is _____ m/s.

Accepted Answer

A)  354.68 
B)  3256 
C)  2.998 × 108 
D)  29980 
E)  3.540 × 108 
A)  354.68 
B)  3256 
C)  2.998 × 108 
D)  29980 
E)  3.540 × 108

Question 13

_____ is the SI unit for frequency which can also be represented as s-1.

Accepted Answer

Question 14

Visible light has wavelengths between _____.

Accepted Answer

The answer of Visible light has wavelengths between _____....

Question 15

What is wavelength?

Accepted Answer

A)  The number of horizontal troughs in a wave. 
B)  The number of vertical peaks in a wave. 
C)  The number of oscillations in a wave. 
D)  The distance between two points in a wave. 
E)  The distance travelled by a wave per unit time. 
A)  The number of horizontal troughs in a wave. 
B)  The number of vertical peaks in a wave. 
C)  The number of oscillations in a wave. 
D)  The distance between two points in a wave. 
E)  The distance travelled by a wave per unit time.

Question 16

According to the Aufbau principle, the 5s subshell gets filled before the 4d subshell.

Accepted Answer

A) True 
 B)False

Question 17

What is the energy of the radiation required to excite an atom from the n1=1 orbit to the n2=4 orbit?

Accepted Answer

A)  1230 kJ/mol of photon 
B)  3120 kJ/mol of photon 
C)  122 kJ/mol of photon 
D)  656 kJ/mol of photon 
E)  434 kJ/mol of photon 
A)  1230 kJ/mol of photon 
B)  3120 kJ/mol of photon 
C)  122 kJ/mol of photon 
D)  656 kJ/mol of photon 
E)  434 kJ/mol of photon

Question 18

How many orbitals are in the principal shell with n = 2?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 19

According to the aufbau principle, which of the following orbitals will be filled up first?

Accepted Answer

A)  5$s$ 
B)  4$d$ 
C)  $5p$ 
D)  4$p$ 
E)  4$f$ 
A)  5$s$ 
B)  4$d$ 
C)  $5p$ 
D)  4$p$ 
E)  4$f$

Question 20

Which of the following has the largest wavelength?

Accepted Answer

A)  Gamma rays 
B)  Infrared rays 
C)  Ultraviolet rays 
D)  Microwaves 
E)  Radiowaves 
A)  Gamma rays 
B)  Infrared rays 
C)  Ultraviolet rays 
D)  Microwaves 
E)  Radiowaves

Exam 6: The Structure of Atoms

Electromagnetic waves can only be transmitted in the Earth's atmosphere.

What is the de Broglie wavelength of an electron traveling at a velocity of 4.53 × 106 m/s in a hydrogen atom? Given: Mass of an electron: 9.11 × 10-31 kilograms

Write a note on the blocks and the corresponding electronic configuration in the periodic table?

The energy level in an atom corresponding to n=5 will have a total of 5 nodes.

Lanthanum is a(n) _____ block element.

How many unpaired electrons does fluorine contain?

Explain the working of a laser with an example.

The number of electrons that can be contained in a 4 ddd subshell is _____.

The Pfund series of lines are due to transitions from higher-energy orbits to orbits with n = 5.

The number of electrons that can be contained in a 4 ppp subshell is _____.

When a pure sample of an individual element is heated (as in a discharge tube), a continuous spectrum of electromagnetic radiation is emitted by the sample.

If a wave has a wavelength of 3256 m and a frequency of 9.180 × 104 s−1, its velocity is _____ m/s.

_____ is the SI unit for frequency which can also be represented as s-1.

Visible light has wavelengths between _____.

What is wavelength?

According to the Aufbau principle, the 5s subshell gets filled before the 4d subshell.

What is the energy of the radiation required to excite an atom from the n1=1 orbit to the n2=4 orbit?

How many orbitals are in the principal shell with n = 2?

According to the aufbau principle, which of the following orbitals will be filled up first?

Which of the following has the largest wavelength?

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

What is the de Broglie wavelength of an electron traveling at a velocity of 4.53 × 10⁶ m/s in a hydrogen atom? Given: Mass of an electron: 9.11 × 10^-31 kilograms

The number of electrons that can be contained in a 4 $d$ subshell is _____.

The number of electrons that can be contained in a 4 $p$ subshell is _____.

If a wave has a wavelength of 3256 m and a frequency of 9.180 × 10⁴ s⁻¹, its velocity is _____ m/s.

_____ is the SI unit for frequency which can also be represented as s^-1.

What is the energy of the radiation required to excite an atom from the n₁=1 orbit to the n₂=4 orbit?