Question 1

Decay of silicon-27 by positron emission yields

Accepted Answer

Positron emission from a nucleus results in the conversion of a proton into a neutron, decreasing the atomic number by one but leaving the mass number unchanged. Therefore, silicon-27 (Si-27) decaying by positron emission would become aluminum-27 (Al-27), as aluminum has an atomic number one less than silicon.

Question 2

Decay of ruthenium-93 by positron emission yields

Accepted Answer

When a nucleus emits a positron, its atomic number decreases by one but its mass number remains unchanged, leading to the formation of technetium-93 from ruthenium-93.

Question 3

Complete and balance the nuclear equation

Accepted Answer

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Question 4

In the following reaction, identify X.

Accepted Answer

The answer of In the following reaction, identify X. 
...

Question 5

Complete and balance the nuclear equation

Accepted Answer

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Question 6

Which isotope, when bombarded with nitrogen-15, yields the artificial isotope dubnium-260 plus 4 neutrons?

Accepted Answer

According to the question, the bombardment of an isotope with nitrogen-15 yields dubnium-260 plus four neutrons. This implies that the original isotope must have an atomic mass of (260 + 4) = 264. From the given options, only californium-249 has an atomic mass close to 264 (249 + 15 = 264). Therefore, option D, californium-249, is the best choice for the given question.

Question 7

Tritium is a radioisotope of hydrogen having a half-life of 12.3 years.If you initially had 1.0 $\times$ 10^-7 mole of tritium, how many moles of tritium would be left after 78 years?

Accepted Answer

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Question 8

Complete and balance the nuclear equation

Accepted Answer

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Question 9

How many ¹⁴C atoms are in a charcoal sample that has a decay rate of 3,500 disintegrations per min? (For ¹⁴C, t_1/2 = 5,730 yr.)

Accepted Answer

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Question 10

Decay of tin-110 by electron capture yields

Accepted Answer

Electron capture by a nucleus results in the conversion of a proton into a neutron, thereby decreasing the atomic number by one while keeping the mass number the same. Tin (Sn) has an atomic number of 50, so the decay of tin-110 by electron capture would produce an element with an atomic number of 49, which is indium (In), making the correct answer indium-110 (C).

Question 11

In the following reaction, identify X.

Accepted Answer

The answer of In the following reaction, identify X. 
...

Question 12

Tritium is a radioisotope of hydrogen having a half-life of 12.3 years.If you initially had 1.0 $\times$ 10^-7 mole of tritium, calculate the decay rate of the sample.

Accepted Answer

The answer of Tritium is a radioisotope of hydrogen having...

Question 13

In the following reaction, identify X.

Accepted Answer

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...

Question 14

What is the decay rate of a sample of a radioisotope that has an activity of 12 microcuries? [1 curie = 3.7 $\times$10¹⁰disintegrations/s]

Accepted Answer

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Question 15

Complete and balance the nuclear equation

Accepted Answer

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Question 16

Decay of lutetium-167 by electron capture yields

Accepted Answer

When lutetium-167 undergoes electron capture, one of its inner-shell electrons combines with a proton in the nucleus to form a neutron. This process results in the atomic number decreasing by one and the mass number remaining the same. The resulting element is ytterbium-167.

Question 17

Complete and balance the nuclear equation

Accepted Answer

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Question 18

Which isotope, when bombarded with oxygen-18, yields the artificial isotope seaborgium-263 plus 4 neutrons?

Accepted Answer

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Question 19

On a neutron number versus proton number plot, the nucleus of oxygen-15 lies below the belt of stability. Write an equation for radioactive decay of oxygen-15.

Accepted Answer

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Question 20

On a plot of the number of neutrons versus the number of protons, a nucleus of aluminum-28 lies above the belt of stability. Write an equation for radioactive decay of aluminum-28.

Accepted Answer

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Quiz 23: Nuclear Chemistry

Decay of silicon-27 by positron emission yields

Decay of ruthenium-93 by positron emission yields

Complete and balance the nuclear equation

In the following reaction, identify X.

Complete and balance the nuclear equation

Which isotope, when bombarded with nitrogen-15, yields the artificial isotope dubnium-260 plus 4 neutrons?

Tritium is a radioisotope of hydrogen having a half-life of 12.3 years.If you initially had 1.0 $\times$ 10^-7 mole of tritium, how many moles of tritium would be left after 78 years?

Complete and balance the nuclear equation

How many ¹⁴C atoms are in a charcoal sample that has a decay rate of 3,500 disintegrations per min? (For ¹⁴C, t_1/2 = 5,730 yr.)

Decay of tin-110 by electron capture yields

In the following reaction, identify X.

Tritium is a radioisotope of hydrogen having a half-life of 12.3 years.If you initially had 1.0 $\times$ 10^-7 mole of tritium, calculate the decay rate of the sample.

In the following reaction, identify X. $In the following reaction, identify X. A) 7 \beta B) 3 \alpha C) 4n D) E) 15p$

What is the decay rate of a sample of a radioisotope that has an activity of 12 microcuries? [1 curie = 3.7 $\times$ 10¹⁰disintegrations/s]

Complete and balance the nuclear equation

Decay of lutetium-167 by electron capture yields

Complete and balance the nuclear equation

Which isotope, when bombarded with oxygen-18, yields the artificial isotope seaborgium-263 plus 4 neutrons?

On a neutron number versus proton number plot, the nucleus of oxygen-15 lies below the belt of stability. Write an equation for radioactive decay of oxygen-15.

On a plot of the number of neutrons versus the number of protons, a nucleus of aluminum-28 lies above the belt of stability. Write an equation for radioactive decay of aluminum-28.

Quiz 23: Nuclear Chemistry

Decay of silicon-27 by positron emission yields

Decay of ruthenium-93 by positron emission yields

Complete and balance the nuclear equation

In the following reaction, identify X.

Complete and balance the nuclear equation

Which isotope, when bombarded with nitrogen-15, yields the artificial isotope dubnium-260 plus 4 neutrons?

Tritium is a radioisotope of hydrogen having a half-life of 12.3 years.If you initially had 1.0 ×\times× 10-7 mole of tritium, how many moles of tritium would be left after 78 years?

Complete and balance the nuclear equation

How many 14C atoms are in a charcoal sample that has a decay rate of 3,500 disintegrations per min? (For 14C, t1/2 = 5,730 yr.)

Decay of tin-110 by electron capture yields

In the following reaction, identify X.

Tritium is a radioisotope of hydrogen having a half-life of 12.3 years.If you initially had 1.0 ×\times× 10-7 mole of tritium, calculate the decay rate of the sample.

In the following reaction, identify X.

What is the decay rate of a sample of a radioisotope that has an activity of 12 microcuries? [1 curie = 3.7 ×\times× 1010 disintegrations/s]

Complete and balance the nuclear equation

Decay of lutetium-167 by electron capture yields

Complete and balance the nuclear equation

Which isotope, when bombarded with oxygen-18, yields the artificial isotope seaborgium-263 plus 4 neutrons?

On a neutron number versus proton number plot, the nucleus of oxygen-15 lies below the belt of stability. Write an equation for radioactive decay of oxygen-15.

On a plot of the number of neutrons versus the number of protons, a nucleus of aluminum-28 lies above the belt of stability. Write an equation for radioactive decay of aluminum-28.

Tritium is a radioisotope of hydrogen having a half-life of 12.3 years.If you initially had 1.0 $\times$ 10^-7 mole of tritium, how many moles of tritium would be left after 78 years?

How many ¹⁴C atoms are in a charcoal sample that has a decay rate of 3,500 disintegrations per min? (For ¹⁴C, t_1/2 = 5,730 yr.)

Tritium is a radioisotope of hydrogen having a half-life of 12.3 years.If you initially had 1.0 $\times$ 10^-7 mole of tritium, calculate the decay rate of the sample.

In the following reaction, identify X. $In the following reaction, identify X. A) 7 \beta B) 3 \alpha C) 4n D) E) 15p$

What is the decay rate of a sample of a radioisotope that has an activity of 12 microcuries? [1 curie = 3.7 $\times$ 10¹⁰disintegrations/s]