Question 1

By what (single step) process does americium-241 decay to neptunium-237?

Accepted Answer

A)   α particle emission
B)   β particle emission
C)   Positron emission
D)   Electron capture
E)   Neutron captureF) B) and E)
G) None of the above

Question 2

When the radioactive nuclide  undergoes positron emission,what is the product nuclide?

Accepted Answer

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

Question 3

The symbol Ga stands for the element

Accepted Answer

A)   gallium
B)   germanium
C)   gold
D)   gadolinium
E)   none of theseF) C) and E)
G) A) and D)

Question 4

The atom with 69 neutrons and 50 protons has a mass number of

Accepted Answer

A)   69
B)   50
C)   19
D)   119
E)   cannot be determined from information givenF) B) and D)
G) D) and E)

Question 5

How many neutrons are contained in an iodine nucleus with a mass number of 130?

Accepted Answer

A)   53
B)   73
C)   77
D)   126
E)   130F) A) and B)
G) None of the above

Question 6

How many atoms of hydrogen are in three molecules of C6H13Cl?

Accepted Answer

A)   39
B)   3 x 1023
C)   13
D)   6 x 1023
E)   13 x 1023F) A) and B)
G) B) and D)

Question 7

Which atomic particle determines the chemical behavior of an atom?

Accepted Answer

A)   proton
B)   electron
C)   neutron
D)   nucleus
E)   none of theseF) C) and D)
G) B) and C)

Question 8

A 4.50 mg sample of a newly discovered radioactive nucleus was analyzed and found to contain only 3.25 mg after a period of 32.1 h.What is the half-life of the nucleus?

Accepted Answer

A)   75.4 h
B)   68.4 h
C)   74.0 h
D)   12.4 h
E)   18.7 hF) D) and E)
G) A) and B)

Question 9

Technetium-99m is routinely used in medical imaging.The italics m means the nucleus is ________.

Accepted Answer

The answer of Technetium-99m is routinely used in medical imaging.The...

Question 10

The symbol for the element calcium is

Accepted Answer

A)   Ca
B)   Co
C)   Cu
D)   C
E)   ClF) A) and B)
G) A) and D)

Question 11

Which of the following sets of nuclei is the most commonly used fissionable isotopes in nuclear reactors?

Accepted Answer

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

Question 12

An atom with 15 protons and 16 neutrons is an atom of

Accepted Answer

A)   P
B)   Ga
C)   S
D)   Pd
E)   RhF) All of the above
G) C) and D)

Question 13

How many electrons are present in a tin atom with a mass number of 119?

Accepted Answer

A)   50
B)   119
C)   169
D)   69
E)   6.02 × 1023F) None of the above
G) All of the above

Question 14

Which of the following is not a metalloid?

Accepted Answer

A)   Antimony
B)   Gallium
C)   Silicon
D)   Germanium
E)   ArsenicF) A) and E)
G) B) and C)

Question 15

Which particle does the nuclide symbol  b represent?

Accepted Answer

A)   electron
B)   positron
C)   gamma ray
D)   proton
E)   helium nucleusF) B) and E)
G) A) and B)

Question 16

Which of the following terms was not discussed by Dalton in his atomic theory?

Accepted Answer

A)   Only isotopes
B)   Ions and protons
C)   Protons,electrons,and neutrons
D)   Only neutrons
E)   Isotopes,ions,protons,electrons,and neutronsF) B) and D)
G) A) and B)

Question 17

What is the most abundant metal on the earth (including the crust,oceans,and atmosphere) ?

Accepted Answer

A)   silicon
B)   oxygen
C)   aluminum
D)   carbon
E)   ironF) A) and E)
G) C) and E)

Question 18

Determine the number of protons and the number of neutrons in an atom of Sn-118.

Accepted Answer

50 protons...

Question 19

Which of the following is a nonmetal?

Accepted Answer

A)   cerium
B)   cesium
C)   carbon
D)   calcium
E)   copperF) C) and E)
G) A) and D)

Question 20

Which of the following does Dalton's Atomic Theory not address?

Accepted Answer

A)   Hydrogen and oxygen gas combine to form water.
B)   H2O2 consists of 16 g of oxygen for every 1 g of hydrogen.
C)   The seat you are sitting on is made up of atoms.
D)   Hydrogen ignites in an open flame but helium does not.
E)   The relative mass of a carbon atom is about 12 times that of hydrogen.F) C) and D)
G) B) and E)

Exam 26: Nuclear Chemistry

A 4.50 mg sample of a newly discovered radioactive nucleus was analyzed and found to contain only 3.25 mg after a period of 32.1 h.What is the half-life of the nucleus?

Correct AnswerverifiedShow Answer

When the radioactive nuclide undergoes positron emission,what is the product nuclide?

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The symbol Ga stands for the element

Correct AnswerverifiedShow Answer

Which of the following terms was not discussed by Dalton in his atomic theory?

Correct AnswerverifiedShow Answer

How many electrons are present in a tin atom with a mass number of 119?

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Which of the following does Dalton's Atomic Theory not address?

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Which particle does the nuclide symbol b represent?

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Which of the following is not a metalloid?

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Determine the number of protons and the number of neutrons in an atom of Sn-118.

Correct Answerverified50 protons...View AnswerShow Answer

How many neutrons are contained in an iodine nucleus with a mass number of 130?

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The atom with 69 neutrons and 50 protons has a mass number of

Correct AnswerverifiedShow Answer

Which atomic particle determines the chemical behavior of an atom?

Correct AnswerverifiedShow Answer

The symbol for the element calcium is

Correct AnswerverifiedShow Answer

An atom with 15 protons and 16 neutrons is an atom of

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What is the most abundant metal on the earth (including the crust,oceans,and atmosphere) ?

Correct AnswerverifiedShow Answer

Which of the following sets of nuclei is the most commonly used fissionable isotopes in nuclear reactors?

Correct AnswerverifiedShow Answer

Technetium-99m is routinely used in medical imaging.The italics m means the nucleus is ________.

Correct AnswerverifiedShow Answer

Which of the following is a nonmetal?

Correct AnswerverifiedShow Answer

How many atoms of hydrogen are in three molecules of C6H13Cl?

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By what (single step) process does americium-241 decay to neptunium-237?

Correct AnswerverifiedShow Answer

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50 protons...
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How many atoms of hydrogen are in three molecules of C₆H₁₃Cl?

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