A) 1 kg m B) 1 g m2 s2 C) 1 kg m2/s D) 1 g m2/s E) 1 kg m2/s2 A) 1 kg m B) 1 g m2 s2 C) 1 kg m2/s D) 1 g m2/s E) 1 kg m2/s2

Exam 19: Nuclear Chemistry

The isotope of iodine with mass number 128 undergoes beta decay with a half-life of 25.00 minutes. The balanced nuclear reaction for this process is: ${ }_{53}^{128} I \rightarrow{ }_{52}^{128} \mathrm{Te}+{ }_{-1}^{0} \beta$

(True/False)

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Question 101

The only stable isotope of iodine is iodine-127. Predict the mode of decay of ${ }_{53}^{130} \mathrm{I}$

(Multiple Choice)

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Question 102

Calcium-45 is more stable than calcium-44.

(True/False)

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Question 103

Which of the following nuclear processes does not change the mass number in the product element formed I. Alpha emission II. Beta emission III. Positron emission IV. Electron capture

(Multiple Choice)

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Question 104

A balanced nuclear equation representing the alpha emission of curium-242 is which of the following

(Multiple Choice)

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Question 105

As a result of alpha emission, the product nucleus is

(Multiple Choice)

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Question 106

In the following reaction, identify X. ${ }_{5}^{10} \mathrm{~B}(\mathrm{X}, \alpha){ }_{3}^{7} \mathrm{Li}$

(Multiple Choice)

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Question 107

The half-life of ¹⁴C is 5,730 yr. Assuming some charcoal from a campfire 29,000 years old was found, what fraction of the original C-14 would remain today

(Multiple Choice)

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Question 108

Which of the following nuclear processes results in an increase of atomic number in the product element formed I. Alpha emission II. Beta emission III. Positron emission IV. Electron capture

(Multiple Choice)

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Question 109

1 joule equals

(Multiple Choice)

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Question 110

The carbon-14 activity of some ancient Indian corn was found to be 7.0 disintegrations per minute (dpm) per gram of carbon. If present-day plant life has 16 dpm per gram of carbon, how old is the Indian corn? (t_1/2 = 5,730 yr)

(Multiple Choice)

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Question 111

Cobalt-60 is a beta emitter with a half-life of 5.3 years. Approximately what fraction of cobalt-60 atoms will remain in a particular sample after 26.5 years

(Multiple Choice)

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Question 112

In passing through matter, alpha particles lose energy chiefly by causing

(Multiple Choice)

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Question 113

Calculate the energy released in joules when one mole of polonium-214 decays according to the equation ${ }_{84}^{214} \mathrm{Po} \rightarrow{ }_{82}^{210} \mathrm{~Pb}+{ }_{2}^{4} \mathrm{He} .$ [Atomic masses: Pb-210 = 209.98284 amu, Po-214 = 213.99519 amu, He-4 = 4.00260 amu.]

(Multiple Choice)

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Question 114

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

(Multiple Choice)

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Question 115

The energy equivalent of a mass defect of - 0.1710 amu is which of the following

(Multiple Choice)

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Question 116

Which of the following nuclear processes results in an increase in the number of neutrons in the product element I. Alpha emission II. Beta emission III. Positron emission IV. Electron capture

(Multiple Choice)

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Question 117

If 12% of a certain radioisotope decays in 5.2 years, what is the half-life of this isotope

(Multiple Choice)

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Question 118

Balance the equation ${ }_{86}^{222} \mathrm{Rn} \rightarrow{ }_{2}^{4} \mathrm{He}+?$

(Multiple Choice)

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Question 119

The isotope of iodine with mass number 128 undergoes beta decay with a half-life of 25.00 minutes. How long will it take for 93.75% of a sample of pure ¹²⁸ I to decay

(Multiple Choice)

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Question 120

Showing 101 - 120 of 128

Exam 19: Nuclear Chemistry

The isotope of iodine with mass number 128 undergoes beta decay with a half-life of 25.00 minutes. The balanced nuclear reaction for this process is: 53128I→52128Te+−10β{ }_{53}^{128} I \rightarrow{ }_{52}^{128} \mathrm{Te}+{ }_{-1}^{0} \beta53128​I→52128​Te+−10​β

The only stable isotope of iodine is iodine-127. Predict the mode of decay of 53130I{ }_{53}^{130} \mathrm{I}53130​I

Calcium-45 is more stable than calcium-44.

Which of the following nuclear processes does not change the mass number in the product element formed I. Alpha emission II. Beta emission III. Positron emission IV. Electron capture

A balanced nuclear equation representing the alpha emission of curium-242 is which of the following

As a result of alpha emission, the product nucleus is

In the following reaction, identify X. 510 B(X,α)37Li{ }_{5}^{10} \mathrm{~B}(\mathrm{X}, \alpha){ }_{3}^{7} \mathrm{Li}510​ B(X,α)37​Li

The half-life of 14C is 5,730 yr. Assuming some charcoal from a campfire 29,000 years old was found, what fraction of the original C-14 would remain today

Which of the following nuclear processes results in an increase of atomic number in the product element formed I. Alpha emission II. Beta emission III. Positron emission IV. Electron capture

1 joule equals

The carbon-14 activity of some ancient Indian corn was found to be 7.0 disintegrations per minute (dpm) per gram of carbon. If present-day plant life has 16 dpm per gram of carbon, how old is the Indian corn? (t1/2 = 5,730 yr)

Cobalt-60 is a beta emitter with a half-life of 5.3 years. Approximately what fraction of cobalt-60 atoms will remain in a particular sample after 26.5 years

In passing through matter, alpha particles lose energy chiefly by causing

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

The energy equivalent of a mass defect of - 0.1710 amu is which of the following

Which of the following nuclear processes results in an increase in the number of neutrons in the product element I. Alpha emission II. Beta emission III. Positron emission IV. Electron capture

If 12% of a certain radioisotope decays in 5.2 years, what is the half-life of this isotope

Balance the equation 86222Rn→24He+?{ }_{86}^{222} \mathrm{Rn} \rightarrow{ }_{2}^{4} \mathrm{He}+?86222​Rn→24​He+?

The isotope of iodine with mass number 128 undergoes beta decay with a half-life of 25.00 minutes. How long will it take for 93.75% of a sample of pure 128 I to decay

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The isotope of iodine with mass number 128 undergoes beta decay with a half-life of 25.00 minutes. The balanced nuclear reaction for this process is: ${ }_{53}^{128} I \rightarrow{ }_{52}^{128} \mathrm{Te}+{ }_{-1}^{0} \beta$

The only stable isotope of iodine is iodine-127. Predict the mode of decay of ${ }_{53}^{130} \mathrm{I}$

In the following reaction, identify X. ${ }_{5}^{10} \mathrm{~B}(\mathrm{X}, \alpha){ }_{3}^{7} \mathrm{Li}$

The half-life of ¹⁴C is 5,730 yr. Assuming some charcoal from a campfire 29,000 years old was found, what fraction of the original C-14 would remain today

The carbon-14 activity of some ancient Indian corn was found to be 7.0 disintegrations per minute (dpm) per gram of carbon. If present-day plant life has 16 dpm per gram of carbon, how old is the Indian corn? (t_1/2 = 5,730 yr)

Balance the equation ${ }_{86}^{222} \mathrm{Rn} \rightarrow{ }_{2}^{4} \mathrm{He}+?$

The isotope of iodine with mass number 128 undergoes beta decay with a half-life of 25.00 minutes. How long will it take for 93.75% of a sample of pure ¹²⁸ I to decay