Activity #7 (Nuclear Chemistry)1. Indicate the number of protons and neutrons in the following nuclei:(a) Mn,(b) 201Hg,(c) potassium-39.2. Complete and balance the following nuclear equations by supplying the missing particle:(a) 2 Cf + 9B103on + ?-(b) {н + ;НеНе +?}H + '}B → 3?3. Cobalt-60 is a strong gamma emitter that has a half-life of 5.26 yr. The cobalt-60 in aradiotherapy unit must be replaced when its radioactivity falls to 75% of the original sample. Ifan original sample was purchased in June 2010, when will it be necessary to replace the cobalt-60?4. How much energy must be supplied to break a single aluminum-27 nucleus into separatedprotons and neutrons if an aluminum-27 atom has a mass of 26.9815386 amu? How muchenergy is required for 100.0 grams of aluminum-27? (The mass of an electron is given on theinside back cover.)

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1. Indicate the number of protons and neutrons in the following nuclei: (a) Mn, (b) 201Hg, (c) potassium-39.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.

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Activity #7 (Nuclear Chemistry)
1. Indicate the number of protons and neutrons in the following nuclei:
(a) Mn,
(b) 201Hg,
(c) potassium-39.
2. Complete and balance the following nuclear equations by supplying the missing particle:
(a) 2 Cf + 9B
10
3on + ?
-
(b) {н + ;Не
Не +?
}H + '}B → 3?
3. Cobalt-60 is a strong gamma emitter that has a half-life of 5.26 yr. The cobalt-60 in a
radiotherapy unit must be replaced when its radioactivity falls to 75% of the original sample. If
an original sample was purchased in June 2010, when will it be necessary to replace the cobalt-
60?
4. How much energy must be supplied to break a single aluminum-27 nucleus into separated
protons and neutrons if an aluminum-27 atom has a mass of 26.9815386 amu? How much
energy is required for 100.0 grams of aluminum-27? (The mass of an electron is given on the
inside back cover.)

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