Homework Answers
ANS-:Balancing a Radioactive Decay Equation *******In balancing a nuclear equation, it is important to remember that the sum of all the mass numbers and atomic numbers, given on the upper left and lower left side of the element symbol, respectively, must be equal for both sides of the equation.
*********Balancing Nuclear Equations-To balance a nuclear equation, the mass number and atomic numbers of all particles on either side of the arrow must be equal..[Nuclear reactions may be shown in a form similar to chemical equations, for which invariant mass, which is the mass not considering the mass defect, must balance for each side of the equation. The transformations of particles must follow certain conservation laws, such as conservation of charge and baryon number, which is the total atomic mass number. ]
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0/1 pts Tect Question 9 Which of the following represents a rule for balancing a nuclear...
rrect Question 11 0/1 pts Which of the following is characteristic of a nuclear reaction? 1....
rrect Question 11 0/1 pts Which of the following is characteristic of a nuclear reaction? 1. Electrons in atomic orbitals are involved in the breaking and forming of bonds II. Elements are converted from one to another III. Reaction rates are typically not affected by catalysts IV. Atoms are rearranged by the breaking and forming of chemical bonds III and IV I, II, III, and IV I, II, and III II and III I and II
0/1 pts Incorrect Question 1 Which of the following is characteristic of a nuclear reaction? I. Electrons in atomic orb...
0/1 pts Incorrect Question 1 Which of the following is characteristic of a nuclear reaction? I. Electrons in atomic orbitals are involved in the breaking and forming of bonds II. Elements are converted from one to another III. Reaction rates are typically not affected by catalysts IV. Atoms are rearranged by the breaking and forming of chemical bonds I, II, and III II and III I and Il I, II, II, and IV lI and IV
Activity 27-7. Nuclear decays II [Accompanies Section 27-6] (a) Rank the following decays in order of...
Activity 27-7. Nuclear decays II [Accompanies Section 27-6] (a) Rank the following decays in order of the change in atomic number Z that occurs in the decaying nucleus, from most positive (greatest increase in Z) to most negative (greatest decrease in Z). If any two decays cause the same change in Z, state this. Explain how you made your ranking. (i) Alpha decay (emission of a He nucleus of charge +2e) (ii) Beta-minus decay (emission of an electron of charge...
Activity 27-4. Nuclear fission (Accompanies Section 27-4] 1 A uranium nucleus (235U) absorbs a neutron. The...
Activity 27-4. Nuclear fission (Accompanies Section 27-4] 1 A uranium nucleus (235U) absorbs a neutron. The result is a uranium nucleus (236U) in an excited state. 3 The excited uranium nucleus fissions into two smaller, more tightly bound nuclei... ...as well as a few neutrons. These can trigger the fission of other 235U nuclei. 3 neutrons Neutron + 2350 236U 134 Te 9976 Z = 0 protons Z = 92 protons N = 1 neutron N = 143 neutrons A=Z+N...
A balanced redox equation must have which of the following: I. The same number of each...
A balanced redox equation must have which of the following: I. The same number of each type of atom on both sides of the equation II. The total number electrons lost in the oxidation equal to total number of electrons gained in the reduction III. The same total charge of all ionic species on both sides of the reaction IV. H 20 present as a product or a reactant O I, II, and III I and 11 I, III, and...
The illustration shows one possible way that a nucleus of uranium-235 (235U) can undergo neutron-induced fission....
The illustration shows one
possible way that a nucleus of uranium-235 (235U) can undergo
neutron-induced fission. (a) Rank the following objects in order of
their binding energy per nucleon, from largest to smallest. If any
two objects have the same binding energy per nucleon, state this.
Explain how you made your ranking. (i) The uranium-235 (235U)
nucleus (ii) The tellurium-134 (134Te) nucleus (iii) The
zirconium-99 (99Zr) nucleus (iv) The three neutrons Activity 27-4
[continued]. (b) Using your results from part...
Activity 27-1. Nuclear sizes [Accompanies Section 27-2] A nucleus of calcium-40 (4ºCa) has 20 protons and...
Activity 27-1. Nuclear sizes [Accompanies Section 27-2] A nucleus of calcium-40 (4ºCa) has 20 protons and 20 neutrons. A nucleus of lead-208 (208Pb) has 82 protons and 126 neutrons. (a) Compared to the radius of a calcium-40 nucleus, the radius of a lead-208 nucleus is (i) 126/20 = 6.3 times larger. (ii) 208/40 = 5.2 times larger. (iii) 82/20 = 4.1 times larger. (iv) (126/20)2 = 2.5 times larger. (v) (208/40)"2 = 2.3 times larger. (vi) (82/20)2 = 2.0 times...
1. Which of the following is true for a chemical reaction at equilibrium? only the forward...
1. Which of the following is true for a chemical reaction at equilibrium? only the forward reaction stops only the reverse reaction stops both the forward and reverse reactions stop the rate constants for the forward and reverse reactions are equal the rates of the forward and reverse reactions are equal 2. A chemical equilibrium may be established by starting a reaction with reactants only. d. any quantities of reactants and products. products only. e. all the above equal quantities...
(a) Rank the following decays in order of the change in atomic number Z that occurs...
(a) Rank the following decays in order of the change in atomic number Z that occurs in the decaying nucleus, from most positive (greatest increase in Z) to most negative (greatest decrease in Z). If any two decays cause the same change in Z, state this. Explain how you made your ranking. (i) Alpha decay (emission of a 4He nucleus of charge +2e) (ii) Beta-minus decay (emission of an electron of charge –e and an antineutrino) (iii) Beta-plus decay (emission...
Question 11 1 pts Which of the following experimental results suggested that the nuclear model on...
Question 11 1 pts Which of the following experimental results suggested that the nuclear model on the right is a better presentation of the atomic structure over the raisin-pudding model on the left? Thomson proposed that small, negative electrons are embedded in a sphere of positive charge. Alpha Sphere of positive charge Atoms of the same element can have different masses, due to the difference in the numbers of neutrons in the nudeus. Millikan's oil experiment determined that the fundamental...
rrect Question 11 0/1 pts Which of the following is characteristic of a nuclear reaction? 1. Electrons in atomic orbitals are involved in the breaking and forming of bonds II. Elements are converted from one to another III. Reaction rates are typically not affected by catalysts IV. Atoms are rearranged by the breaking and forming of chemical bonds III and IV I, II, III, and IV I, II, and III II and III I and II
0/1 pts Incorrect Question 1 Which of the following is characteristic of a nuclear reaction? I. Electrons in atomic orbitals are involved in the breaking and forming of bonds II. Elements are converted from one to another III. Reaction rates are typically not affected by catalysts IV. Atoms are rearranged by the breaking and forming of chemical bonds I, II, and III II and III I and Il I, II, II, and IV lI and IV
Activity 27-7. Nuclear decays II [Accompanies Section 27-6] (a) Rank the following decays in order of the change in atomic number Z that occurs in the decaying nucleus, from most positive (greatest increase in Z) to most negative (greatest decrease in Z). If any two decays cause the same change in Z, state this. Explain how you made your ranking. (i) Alpha decay (emission of a He nucleus of charge +2e) (ii) Beta-minus decay (emission of an electron of charge...
Activity 27-4. Nuclear fission (Accompanies Section 27-4] 1 A uranium nucleus (235U) absorbs a neutron. The result is a uranium nucleus (236U) in an excited state. 3 The excited uranium nucleus fissions into two smaller, more tightly bound nuclei... ...as well as a few neutrons. These can trigger the fission of other 235U nuclei. 3 neutrons Neutron + 2350 236U 134 Te 9976 Z = 0 protons Z = 92 protons N = 1 neutron N = 143 neutrons A=Z+N...
A balanced redox equation must have which of the following: I. The same number of each type of atom on both sides of the equation II. The total number electrons lost in the oxidation equal to total number of electrons gained in the reduction III. The same total charge of all ionic species on both sides of the reaction IV. H 20 present as a product or a reactant O I, II, and III I and 11 I, III, and...
The illustration shows one
possible way that a nucleus of uranium-235 (235U) can undergo
neutron-induced fission. (a) Rank the following objects in order of
their binding energy per nucleon, from largest to smallest. If any
two objects have the same binding energy per nucleon, state this.
Explain how you made your ranking. (i) The uranium-235 (235U)
nucleus (ii) The tellurium-134 (134Te) nucleus (iii) The
zirconium-99 (99Zr) nucleus (iv) The three neutrons Activity 27-4
[continued]. (b) Using your results from part...
Activity 27-1. Nuclear sizes [Accompanies Section 27-2] A nucleus of calcium-40 (4ºCa) has 20 protons and 20 neutrons. A nucleus of lead-208 (208Pb) has 82 protons and 126 neutrons. (a) Compared to the radius of a calcium-40 nucleus, the radius of a lead-208 nucleus is (i) 126/20 = 6.3 times larger. (ii) 208/40 = 5.2 times larger. (iii) 82/20 = 4.1 times larger. (iv) (126/20)2 = 2.5 times larger. (v) (208/40)"2 = 2.3 times larger. (vi) (82/20)2 = 2.0 times...
1. Which of the following is true for a chemical reaction at equilibrium? only the forward reaction stops only the reverse reaction stops both the forward and reverse reactions stop the rate constants for the forward and reverse reactions are equal the rates of the forward and reverse reactions are equal 2. A chemical equilibrium may be established by starting a reaction with reactants only. d. any quantities of reactants and products. products only. e. all the above equal quantities...
Question 11 1 pts Which of the following experimental results suggested that the nuclear model on the right is a better presentation of the atomic structure over the raisin-pudding model on the left? Thomson proposed that small, negative electrons are embedded in a sphere of positive charge. Alpha Sphere of positive charge Atoms of the same element can have different masses, due to the difference in the numbers of neutrons in the nudeus. Millikan's oil experiment determined that the fundamental...
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