Question 1

Which of the following processes represents the ionization energy of bromine?

Accepted Answer

A) Br(s)     Br+(g)+ e- 
B) Br(l)     Br+(g)+ e- 
C) Br(g)     Br+(g)+ e- 
D) Br(s)     Br+(s)+ e- 
E) Br2(g)     Br2+(g)+ e- 
A) Br(s)     Br+(g)+ e- 
B) Br(l)     Br+(g)+ e- 
C) Br(g)     Br+(g)+ e- 
D) Br(s)     Br+(s)+ e- 
E) Br2(g)     Br2+(g)+ e-

Question 2

The electron configuration for the barium atom is:

Accepted Answer

A) 1s22s22p63s23p64s23d10 
B) [Xe]6s2 
C) 1s22s22p63s23p64s1 
D) 1s22s22p63s23p64s2 
E) none of these 
A) 1s22s22p63s23p64s23d10 
B) [Xe]6s2 
C) 1s22s22p63s23p64s1 
D) 1s22s22p63s23p64s2 
E) none of these

Question 3

From the following list of observations,choose the one that most clearly supports the following conclusion:
a)emission spectrum of hydrogen
b)the photoelectric effect
c)scattering of alpha particles by metal foil
d)diffraction
e)cathode "rays"
-Electromagnetic radiation has wave characteristics.

Accepted Answer

A) observation a 
B) observation b 
C) observation c 
D) observation d 
E) observation e 
A) observation a 
B) observation b 
C) observation c 
D) observation d 
E) observation e

Question 4

The statement that "the lowest energy configuration for an atom is the one having the maximum number of unpaired electrons allowed by the Pauli principle in a particular set of degenerate orbitals" is known as

Accepted Answer

A) the aufbau principle 
B) Hund's rule 
C) Heisenberg uncertainty principle 
D) the Pauli exclusion principle 
E) the quantum model 
A) the aufbau principle 
B) Hund's rule 
C) Heisenberg uncertainty principle 
D) the Pauli exclusion principle 
E) the quantum model

Question 5

How many electrons in an atom can have the following quantum numbers?
a)n = 3
b)n = 2,l = 0
c)n = 2,l = 2,ml = 0
d)n = 2,l = 0,ml = 0,ms = 1/2

Accepted Answer

a)18;b)2;c)0;d)1
a)The n = 3 level consi

Question 6

A line in the spectrum of atomic mercury has a wavelength of 254 nm.When mercury emits a photon of light at this wavelength,the frequency of this light is

Accepted Answer

A) 8.47 $\times$ 10-16 s-1 
B) 7.82 $\times$10-19 s-1 
C) 1.18 $\times$ 1015 s-1 
D) 76.1 s-1 
E) none of these 
A) 8.47 $\times$ 10-16 s-1 
B) 7.82 $\times$10-19 s-1 
C) 1.18 $\times$ 1015 s-1 
D) 76.1 s-1 
E) none of these

Question 7

Fe has __________ that is (are)unpaired in its d orbitals.

Accepted Answer

A) one electron 
B) two electrons 
C) three electrons 
D) four electrons 
E) none of these 
A) one electron 
B) two electrons 
C) three electrons 
D) four electrons 
E) none of these

Question 8

Consider the following representation of a 2p-orbital:   Which of the following statements best describes the movement of electrons in a p-orbital?

Accepted Answer

A) The electrons move along the outer surface of the p-orbital,similar to a "figure 8" type of movement. 
B) The electrons move within the two lobes of the p-orbital,but never beyond the outside surface of the orbital. 
C) The electrons are concentrated at the center (node)of the two lobes. 
D) The electrons are only moving in one lobe at any given time. 
E) The electron movement cannot be exactly determined. 
A) The electrons move along the outer surface of the p-orbital,similar to a "figure 8" type of movement. 
B) The electrons move within the two lobes of the p-orbital,but never beyond the outside surface of the orbital. 
C) The electrons are concentrated at the center (node)of the two lobes. 
D) The electrons are only moving in one lobe at any given time. 
E) The electron movement cannot be exactly determined.

Question 9

List the following atoms in order of increasing ionization energy: Li,Na,C,O,F.

Accepted Answer

A) Li < Na < C < O < F 
B) Na < Li < C < O < F 
C) F < O < C < Li < Na 
D) Na < Li < F < O < C 
E) Na < Li < C < F < O 
A) Li < Na < C < O < F 
B) Na < Li < C < O < F 
C) F < O < C < Li < Na 
D) Na < Li < F < O < C 
E) Na < Li < C < F < O

Question 10

Which of the following is a reasonable criticism of the Bohr model of the atom?

Accepted Answer

A) It makes no attempt to explain why the negative electron does not eventually fall into the positive nucleus. 
B) It does not adequately predict the line spectrum of hydrogen. 
C) It does not adequately predict the ionization energy of the valence electron(s)for elements other than hydrogen. 
D) It does not adequately predict the ionization energy of the first energy level electrons for one-electron species for elements other than hydrogen. 
E) It shows the electrons to exist outside of the nucleus. 
A) It makes no attempt to explain why the negative electron does not eventually fall into the positive nucleus. 
B) It does not adequately predict the line spectrum of hydrogen. 
C) It does not adequately predict the ionization energy of the valence electron(s)for elements other than hydrogen. 
D) It does not adequately predict the ionization energy of the first energy level electrons for one-electron species for elements other than hydrogen. 
E) It shows the electrons to exist outside of the nucleus.

Question 11

Write the electron configuration for the following:
-P

Accepted Answer

1s²2s²2p⁶3s²3p

Question 12

The __________ quantum number is related to the size and energy of the orbital.

Accepted Answer

The answer of The __________ quantum number is related to...

Question 13

Of the following elements,which needs three electrons to complete its valence shell?

Accepted Answer

A) Ba 
B) Ca 
C) Si 
D) P 
E) Cl 
A) Ba 
B) Ca 
C) Si 
D) P 
E) Cl

Question 14

Which of the following statements is false?

Accepted Answer

A) An orbital can accommodate at most two electrons. 
B) The electron density at a point is proportional to $\varPsi$ 2 at that point. 
C) The spin quantum number of an electron must be either +   or -   . 
D) A 2p orbital is more penetrating than a 2s;i.e. ,it has a higher electron density near the nucleus and inside the charge cloud of a 1s orbital. 
E) In the usual order of filling,the 6s orbital is filled before the 4f orbital. 
A) An orbital can accommodate at most two electrons. 
B) The electron density at a point is proportional to $\varPsi$ 2 at that point. 
C) The spin quantum number of an electron must be either +   or -   . 
D) A 2p orbital is more penetrating than a 2s;i.e. ,it has a higher electron density near the nucleus and inside the charge cloud of a 1s orbital. 
E) In the usual order of filling,the 6s orbital is filled before the 4f orbital.

Question 15

Choose the atom or ion using a periodic table.
-Larger atomic or ionic radius,F or F-

Accepted Answer

Question 16

When examining the electromagnetic spectrum,why is it more harmful to be exposed to x-rays than radio waves over a period of time? In your explanation,include the concepts of frequency,waves,and energy.Also,draw transverse waves to assist in your explanation.

Accepted Answer

X-rays have a shorter wavelength (in the

Question 17

Which of the following statements is true?

Accepted Answer

A) The krypton 1s orbital is smaller than the helium 1s orbital because krypton's nuclear charge draws the electrons closer. 
B) The krypton 1s orbital is larger than the helium 1s orbital because krypton contains more electrons. 
C) The krypton 1s orbital is smaller than the helium 1s orbital because krypton's p and d orbitals crowd the s orbitals. 
D) The krypton 1s orbital and helium 1s orbital are the same size because both s orbitals can only have two electrons. 
E) The krypton 1s orbital is larger than the helium 1s orbital because krypton's ionization energy is lower,so it's easier to remove electrons. 
A) The krypton 1s orbital is smaller than the helium 1s orbital because krypton's nuclear charge draws the electrons closer. 
B) The krypton 1s orbital is larger than the helium 1s orbital because krypton contains more electrons. 
C) The krypton 1s orbital is smaller than the helium 1s orbital because krypton's p and d orbitals crowd the s orbitals. 
D) The krypton 1s orbital and helium 1s orbital are the same size because both s orbitals can only have two electrons. 
E) The krypton 1s orbital is larger than the helium 1s orbital because krypton's ionization energy is lower,so it's easier to remove electrons.

Question 18

Which of the following statements about quantum theory is incorrect?

Accepted Answer

A) The energy and position of an electron cannot be determined simultaneously. 
B) Lower energy orbitals are filled with electrons before higher energy orbitals. 
C) When filling orbitals of equal energy,two electrons will occupy the same orbital before filling a new orbital. 
D) No two electrons can have the same four quantum numbers. 
E) All of these are correct. 
A) The energy and position of an electron cannot be determined simultaneously. 
B) Lower energy orbitals are filled with electrons before higher energy orbitals. 
C) When filling orbitals of equal energy,two electrons will occupy the same orbital before filling a new orbital. 
D) No two electrons can have the same four quantum numbers. 
E) All of these are correct.

Question 19

Given the following electronic configuration of neutral atoms,identify the element and state the number of unpaired electrons in its ground state:
-[Ne]3s23p5

Accepted Answer

The element is Cl wi

Question 20

When electron configurations differ from expected,it is because orbitals want to be half-filled.

Accepted Answer

A) True 
 B)False

Exam 7: Atomic Structure and Periodicity

Which of the following processes represents the ionization energy of bromine?

The electron configuration for the barium atom is:

From the following list of observations,choose the one that most clearly supports the following conclusion: a)emission spectrum of hydrogen b)the photoelectric effect c)scattering of alpha particles by metal foil d)diffraction e)cathode "rays" -Electromagnetic radiation has wave characteristics.

The statement that "the lowest energy configuration for an atom is the one having the maximum number of unpaired electrons allowed by the Pauli principle in a particular set of degenerate orbitals" is known as

How many electrons in an atom can have the following quantum numbers? a)n = 3 b)n = 2,l = 0 c)n = 2,l = 2,ml = 0 d)n = 2,l = 0,ml = 0,ms = 1/2

A line in the spectrum of atomic mercury has a wavelength of 254 nm.When mercury emits a photon of light at this wavelength,the frequency of this light is

Fe has __________ that is (are)unpaired in its d orbitals.

Consider the following representation of a 2p-orbital: Which of the following statements best describes the movement of electrons in a p-orbital?

List the following atoms in order of increasing ionization energy: Li,Na,C,O,F.

Which of the following is a reasonable criticism of the Bohr model of the atom?

Write the electron configuration for the following: -P

The __________ quantum number is related to the size and energy of the orbital.

Of the following elements,which needs three electrons to complete its valence shell?

Which of the following statements is false?

Choose the atom or ion using a periodic table. -Larger atomic or ionic radius,F or F-

When examining the electromagnetic spectrum,why is it more harmful to be exposed to x-rays than radio waves over a period of time? In your explanation,include the concepts of frequency,waves,and energy.Also,draw transverse waves to assist in your explanation.

Which of the following statements is true?

Which of the following statements about quantum theory is incorrect?

Given the following electronic configuration of neutral atoms,identify the element and state the number of unpaired electrons in its ground state: -[Ne]3s23p5

When electron configurations differ from expected,it is because orbitals want to be half-filled.

Chemical Foundations

Atoms, molecules, and Ions

Stoichiometry

Chemical Reactions and Solutions Stoichiometry

Gases

Thermochemistry

Bonding: General Concepts

Covalent Bonding: Orbitals

Liquids and Solids

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex Ion Equilibria

Spontaneity, entropy, and Free Energy

Electrochemistry

The Nucleus: a Chemists View

The Representative Elements

Transition Metals and Coordination Chemistry

Organic and Biological Molecules

Filters

How many electrons in an atom can have the following quantum numbers? a)n = 3 b)n = 2,l = 0 c)n = 2,l = 2,m_l= 0 d)n = 2,l = 0,m_l = 0,m_s = 1/2

Choose the atom or ion using a periodic table. -Larger atomic or ionic radius,F or F^-

Given the following electronic configuration of neutral atoms,identify the element and state the number of unpaired electrons in its ground state: -[Ne]3s²3p⁵