Question 1

How many electrons are there in the 3rd principal energy level (n = 3)of a phosphorus atom?

Accepted Answer

A) 3 
B) 5. 
C) 6 
D) 8 
E) 10 
A) 3 
B) 5. 
C) 6 
D) 8 
E) 10

Question 2

Which element has the following ground-state electron configuration? [Kr]5s14d5

Accepted Answer

A) Mn 
B) Mo 
C) Nb 
D) Re 
E) Tc 
A) Mn 
B) Mo 
C) Nb 
D) Re 
E) Tc

Question 3

Write the ground state electron configuration for a lead atom.

Accepted Answer

The answer of Write the ground state electron configuration for...

Question 4

An electron in a 3p orbital could have a value of 2 for its angular momentum quantum number (l).

Accepted Answer

A) True 
 B)False

Question 5

When the electron in a hydrogen atom falls from its first excited energy level to the ground state energy level, a photon with wavelength $\lambda$ is emitted. A proton having this same wavelength would have a velocity of

Accepted Answer

A) 3.87 m/s 
B) 5990 m/s 
C) 1.21 * 10-7 m/s 
D) 3.26 m/s 
E) 5.99 m/s 
A) 3.87 m/s 
B) 5990 m/s 
C) 1.21 * 10-7 m/s 
D) 3.26 m/s 
E) 5.99 m/s

Question 6

Which of the following is diamagnetic both in its ground state and in all of its excited states?

Accepted Answer

A) Mg 
B) Ne 
C) Cu 
D) Zn 
E) none of these 
A) Mg 
B) Ne 
C) Cu 
D) Zn 
E) none of these

Question 7

What is the wavelength of a ball bearing with a mass of 10.0 g, and a velocity of 10.0 cm/s?

Accepted Answer

6.63 * 10<

Question 8

In an electron microscope, electrons are accelerated to great velocities. Calculate the wavelength of an electron traveling with a velocity of 7.0 * 103 kilometers per second. The mass of an electron is 9.1 * 10-28 g.

Accepted Answer

A) 1.0 * 10-13 m 
B) 1.0 * 10-7 m 
C) 1.0 m 
D) 1.0 * 10-10 m 
A) 1.0 * 10-13 m 
B) 1.0 * 10-7 m 
C) 1.0 m 
D) 1.0 * 10-10 m

Question 9

Calculate the frequency of visible light having a wavelength of 486 nm.

Accepted Answer

A) 2.06 * 1014 /s 
B) 2.06 * 106 /s 
C) 6.17 * 1014 /s 
D) 1.20 * 10-15 /s 
E) 4.86 * 10-7 /s 
A) 2.06 * 1014 /s 
B) 2.06 * 106 /s 
C) 6.17 * 1014 /s 
D) 1.20 * 10-15 /s 
E) 4.86 * 10-7 /s

Question 10

Which of the following atoms is paramagnetic both in its ground state and in all of its excited states?

Accepted Answer

A) C 
B) N 
C) O 
D) Ti 
E) Cr 
A) C 
B) N 
C) O 
D) Ti 
E) Cr

Question 11

Which element has the following ground-state electron configuration? [Kr]5s24d105p3

Accepted Answer

A) Sn 
B) Sb 
C) Pb 
D) Bi 
E) Te 
A) Sn 
B) Sb 
C) Pb 
D) Bi 
E) Te

Question 12

A ground-state atom of iron has ___ unpaired electrons and is _____.

Accepted Answer

A) 0, diamagnetic 
B) 6, diamagnetic 
C) 3, paramagnetic 
D) 5, paramagnetic 
E) 4, paramagnetic 
A) 0, diamagnetic 
B) 6, diamagnetic 
C) 3, paramagnetic 
D) 5, paramagnetic 
E) 4, paramagnetic

Question 13

In the following diagram of a wave

Accepted Answer

A) (a)is amplitude and (b)is wavelength 
B) (a)is frequency and (b)is amplitude 
C) (a)is wavelength and (b)is frequency 
D) (a)is amplitude and (b)is frequency 
E) (a)is wavelength and (b)is amplitude 
A) (a)is amplitude and (b)is wavelength 
B) (a)is frequency and (b)is amplitude 
C) (a)is wavelength and (b)is frequency 
D) (a)is amplitude and (b)is frequency 
E) (a)is wavelength and (b)is amplitude

Question 14

A ground-state chromium atom has how many unpaired electrons?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 5 
E) 6 
A) 1 
B) 2 
C) 4 
D) 5 
E) 6

Question 15

What is the electron configuration of calcium?

Accepted Answer

1s²2s²2p⁶3s²3p

Question 16

A common way of initiating certain chemical reactions with light involves the generation of free halogen atoms in solution. If $\Delta$H for the reaction Cl2(g)$\rarr$ 2Cl(g)is 242.8 kJ/mol, what is the longest wavelength of light that will produce free chlorine atoms in solution?

Accepted Answer

A) 246.3 nm 
B) 465.2 nm 
C) 349.3 nm 
D) 698.6 nm 
E) 492.6 nm 
A) 246.3 nm 
B) 465.2 nm 
C) 349.3 nm 
D) 698.6 nm 
E) 492.6 nm

Question 17

A single pulse of a laser yields an average of 5.00 * 1018 photons with $\lambda$ = 633 nm. If melting ice to water at 0°C requires 6.01 kJ/mol, what is the fewest number of laser pulses need to melt 10.0 g of ice?

Accepted Answer

A) 3830 
B) 3340 
C) 38300 
D) 2120 
E) 212 
A) 3830 
B) 3340 
C) 38300 
D) 2120 
E) 212

Question 18

The colors of the visible spectrum are blue, green, orange, red, violet, and yellow.Of these colors, _______ has the most energy.

Accepted Answer

The answer of The colors of the visible spectrum are...

Question 19

A ground-state atom of arsenic has

Accepted Answer

A) no unpaired electrons. 
B) one unpaired electron. 
C) two unpaired electrons. 
D) three unpaired electrons. 
E) four unpaired electrons. 
A) no unpaired electrons. 
B) one unpaired electron. 
C) two unpaired electrons. 
D) three unpaired electrons. 
E) four unpaired electrons.

Question 20

As the frequency of an electromagnetic wave increases

Accepted Answer

A) its speed must increase. 
B) its wavelength must increase. 
C) its amplitude must increase. 
D) its energy must increase. 
A) its speed must increase. 
B) its wavelength must increase. 
C) its amplitude must increase. 
D) its energy must increase.

Exam 7: Quantum Theory and the Electronic Structure of Atoms

How many electrons are there in the 3rd principal energy level (n = 3)of a phosphorus atom?

Which element has the following ground-state electron configuration? [Kr]5s14d5

Write the ground state electron configuration for a lead atom.

An electron in a 3p orbital could have a value of 2 for its angular momentum quantum number (l).

When the electron in a hydrogen atom falls from its first excited energy level to the ground state energy level, a photon with wavelength λ\lambdaλ is emitted. A proton having this same wavelength would have a velocity of

Which of the following is diamagnetic both in its ground state and in all of its excited states?

What is the wavelength of a ball bearing with a mass of 10.0 g, and a velocity of 10.0 cm/s?

In an electron microscope, electrons are accelerated to great velocities. Calculate the wavelength of an electron traveling with a velocity of 7.0 * 103 kilometers per second. The mass of an electron is 9.1 * 10-28 g.

Calculate the frequency of visible light having a wavelength of 486 nm.

Which of the following atoms is paramagnetic both in its ground state and in all of its excited states?

Which element has the following ground-state electron configuration? [Kr]5s24d105p3

A ground-state atom of iron has ___ unpaired electrons and is _____.

In the following diagram of a wave

A ground-state chromium atom has how many unpaired electrons?

What is the electron configuration of calcium?

A common way of initiating certain chemical reactions with light involves the generation of free halogen atoms in solution. If Δ\DeltaΔ H for the reaction Cl2(g) →\rarr→ 2Cl(g)is 242.8 kJ/mol, what is the longest wavelength of light that will produce free chlorine atoms in solution?

A single pulse of a laser yields an average of 5.00 * 1018 photons with λ\lambdaλ = 633 nm. If melting ice to water at 0°C requires 6.01 kJ/mol, what is the fewest number of laser pulses need to melt 10.0 g of ice?

The colors of the visible spectrum are blue, green, orange, red, violet, and yellow.Of these colors, _______ has the most energy.

A ground-state atom of arsenic has

As the frequency of an electromagnetic wave increases

Chemistry: The Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solution

Gases

Thermo-Chemistry

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Chemistry in the Atmosphere

Entropy, Free Energy, and Equilibrium

Electrochemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Nuclear Chemistry

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

Which element has the following ground-state electron configuration? [Kr]5s¹4d⁵

When the electron in a hydrogen atom falls from its first excited energy level to the ground state energy level, a photon with wavelength $\lambda$ is emitted. A proton having this same wavelength would have a velocity of

In an electron microscope, electrons are accelerated to great velocities. Calculate the wavelength of an electron traveling with a velocity of 7.0 * 10³ kilometers per second. The mass of an electron is 9.1 * 10^-28 g.

Which element has the following ground-state electron configuration? [Kr]5s²4d¹⁰5p³

A ground-state atom of iron has _ unpaired electrons and is ___.

A common way of initiating certain chemical reactions with light involves the generation of free halogen atoms in solution. If $\Delta$ H for the reaction Cl₂(g) $\rarr$ 2Cl(g)is 242.8 kJ/mol, what is the longest wavelength of light that will produce free chlorine atoms in solution?

A single pulse of a laser yields an average of 5.00 * 10¹⁸ photons with $\lambda$ = 633 nm. If melting ice to water at 0°C requires 6.01 kJ/mol, what is the fewest number of laser pulses need to melt 10.0 g of ice?