Question 1

The rate of a nuclear reaction can be changed by

Accepted Answer

A)  adding a catalyst.
B)  decreasing the pressure.
C)  increasing the temperature.
D)  None of theseE) A) and B)
F) A) and C)

Question 2

In which of the following sets do all species have the same number of electrons?

Accepted Answer

A)  Br-,Kr,Sr2+
B)  C,N3-,O2-
C)  Mg2+,Sr2+,Ba2+
D)  O,O2-,O2+E) A) and C)
F) None of the above

Question 3

Use the periodic table below to answer the following questions. 
-Which is most likely to form a binary oxide with the formula MO (where M = element A,B,C,or D) ?

Accepted Answer

A)  element A
B)  element B
C)  element C
D)  element DE) A) and B)
F) None of the above

Question 4

Beta decay of 24Na produces a beta particle and

Accepted Answer

A)  (20F.) 
B)  (23Na.) 
C)  (24Ne.) 
D)  (24Mg.) E) C) and D)
F) A) and B)

Question 5

Which of the following elements would be expected to be particularly stable?

Accepted Answer

A)   
B)   
C)   
D)   E) All of the above
F) A) and B)

Question 6

How many electrons are in the ion,Cu2+?

Accepted Answer

A)  27
B)  29
C)  31
D)  64E) A) and B)
F) A) and C)

Question 7

An alpha particle is

Accepted Answer

A)    .
B)    .
C)    .
D)    .E) B) and D)
F) None of the above

Question 8

Positron emission changes the atomic number of an element by

Accepted Answer

A)  -2.
B)  -1.
C)  +1.
D)  +2.E) A) and B)
F) All of the above

Question 9

Which of the following nuclides is most likely to decay by electron capture?

Accepted Answer

A)   
B)   
C)   
D)   E) All of the above
F) A) and B)

Question 10

The symbol of the isotope having Z = 88 and A = 226 is ________.

Accepted Answer

The answer of The symbol of the isotope having Z...

Question 11

The bonding in MgO is ________,whereas the bonding in CO is ________.

Accepted Answer

The answer of The bonding in MgO is ________,whereas the...

Question 12

A sample of pure lithium carbonate contains 18.8.4% lithium by mass.What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?

Accepted Answer

A)  9) 40%
B)  18.8%
C)  37.6%
D)  75.2%E) A) and D)
F) All of the above

Question 13

-What kind of decay process is occurring in the decay of isotope C to isotope D in the figure shown above?

Accepted Answer

A)  α emission
B)  β emission
C)  γ emission
D)  electron capture or positron emissionE) A) and B)
F) B) and D)

Question 14

The number of atoms in 23 g of Na is ________ (greater than,less than,the same as)the number of atoms in 12 g of C.

Accepted Answer

The answer of The number of atoms in 23 g...

Question 15

A radioisotope has a neutron/proton ratio which is too low.Which of the following processes will not occur for such a nucleus?

Accepted Answer

A)  alpha emission
B)  beta emission
C)  electron capture
D)  positron emissionE) B) and C)
F) A) and B)

Question 16

How many protons (p) ,neutrons (n) ,and electrons (e) are in one atom of 
?

Accepted Answer

A)  12 p,12 n,12 e
B)  12 p,11 n,12 e
C)  12 p,11 n,10 e
D)  12 p,11 n,14 eE) A) and B)
F) B) and C)

Question 17

Which of the following statements is not a postulate of Dalton's atomic theory?

Accepted Answer

A)  Each element is characterized by the mass of its atoms.
B)  Atoms are composed of protons,neutrons,and electrons.
C)  Chemical reactions only rearrange atomic combinations.
D)  Elements are composed of atoms.E) A) and B)
F) A) and C)

Question 18

Which of the following nuclides is most likely to undergo beta decay?

Accepted Answer

A)   
B)   
C)   
D)   E) A) and B)
F) B) and C)

Question 19

Which of the following figures represents 
? Unshaded spheres represent neutrons and shaded spheres represent protons.

Accepted Answer

A)  figure (1) 
B)  figure (2) 
C)  figure (3) 
D)  figure (4) E) A) and B)
F) All of the above

Question 20

The formula of iron(III)oxide contains ________ iron(III)and ________ oxide ions.

Accepted Answer

The answer of The formula of iron(III)oxide contains ________ iron(III)and...

Exam 2: Atoms, molecules, and Ions

Which of the following elements would be expected to be particularly stable?

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Positron emission changes the atomic number of an element by

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Which of the following nuclides is most likely to decay by electron capture?

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Use the periodic table below to answer the following questions. -Which is most likely to form a binary oxide with the formula MO (where M = element A,B,C,or D) ?

Correct AnswerverifiedShow Answer

In which of the following sets do all species have the same number of electrons?

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The symbol of the isotope having Z = 88 and A = 226 is ________.

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A sample of pure lithium carbonate contains 18.8.4% lithium by mass.What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?

Correct AnswerverifiedShow Answer

Which of the following statements is not a postulate of Dalton's atomic theory?

Correct AnswerverifiedShow Answer

A radioisotope has a neutron/proton ratio which is too low.Which of the following processes will not occur for such a nucleus?

Correct AnswerverifiedShow Answer

The number of atoms in 23 g of Na is ________ (greater than,less than,the same as)the number of atoms in 12 g of C.

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Beta decay of 24Na produces a beta particle and

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How many electrons are in the ion,Cu2+?

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The rate of a nuclear reaction can be changed by

Correct AnswerverifiedShow Answer

How many protons (p) ,neutrons (n) ,and electrons (e) are in one atom of ?

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An alpha particle is

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The formula of iron(III)oxide contains ________ iron(III)and ________ oxide ions.

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Which of the following figures represents ? Unshaded spheres represent neutrons and shaded spheres represent protons.

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-What kind of decay process is occurring in the decay of isotope C to isotope D in the figure shown above?

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Which of the following nuclides is most likely to undergo beta decay?

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The bonding in MgO is ________,whereas the bonding in CO is ________.

Correct AnswerverifiedShow Answer

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Beta decay of ²⁴Na produces a beta particle and

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How many electrons are in the ion,Cu²⁺?

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The formula of iron(III)oxide contains iron(III)and oxide ions.

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The bonding in MgO is ,whereas the bonding in CO is .

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