1.) Which of the following nuclides would you predict to be stable and which radioactive (Hint:...
1.) Which of the following nuclides would you predict to be stable and which radioactive (Hint: calculate the N/Z ratio and examine the number of nucleons present in each isotope.)
a. Neon-20
b. Sulfur-31
c. Thorium-230
d. Barium-133
2.) Why is sulfur-32 more stable than sulfur-31 unstable?
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Homework Answers
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1.) Which of the following nuclides would you predict to be
stable and which radioactive (Hint:...
4. Which of the nuclides below would you predict to be stable? 166 48 32 60...
4. Which of the nuclides below would you predict to be stable? 166 48 32 60 (b) 19K (c) 18Ar 92 46 32 (e) 16
help!! 1. The two rarest naturally occurring elements are astatine (At. Element 85) and francium (Fr,...
help!!
1. The two rarest naturally occurring elements are astatine (At. Element 85) and francium (Fr, element 87). Both are very short-lived, undergoing radioactive decay rapidly. For astatine, the longest-lived isotope is 210 At, with a half-life of 8.1 hours. For francium, the longest- lived isotope is 223Fr, with a half-life of 22 minutes. Despite 210 At having a longer half-life than 223Fr, there is much less astatine than francium on Earth (approximately 1 ounce of astatine compared to 30...
Hello, I was wondering if you could check my answers 27. Within wi:1.PBLSteatorn withthe Small stttomic...
Hello, I was wondering if you could check my answers
27. Within wi:1.PBLSteatorn withthe Small stttomic radius a) Bi c) As 2nd is Sma lles S mall 28. Within Group 14, which of the following is the, most metallic elemen b Si Ge 29. Which of the following has an ionic radius that is smaller than its atomic radius? a) neon Nc nitrogen c) sodiuma sulfur 30. Which of the following molecules does not have a polar covalent bond? a)...
need help with 1-21 1) Label the steps below as "slow" and "fast". HCH 013 10...
need help with 1-21
1) Label the steps below as "slow" and "fast". HCH 013 10 = H. C + + H-LG H-LG 2) Why are they slow/fast? Explain using chemical terms. Stereochemistry of the Sn1 reaction 3) What type of intermediate does the Sn1 reaction proceed through? 4) What is the geometry of the carbon that the nucleophile coordinates to in the 2 step? 5) From how many directions would it be reasonable for the nucleophile to approach the...
Use the following information about Company X to help answer problems 1-10. Company X went public...
Use the following information about Company X to help answer problems 1-10. Company X went public at the start of 2016, $100M shares of stock were issued at $18.60 per share. At the end of 2016, Company X traded at $20.00 per share. During 2017, Company X issued 5 shares at $20.00 per share, thus raising $100M of capital At the end of 2017, Company X traded at $20.46 per share. A summary of Company X's 2016 and 2017 10k...
29. Which of the following would be synthesized in and processed by the smooth endoplasmic reticulum...
29. Which of the following would be synthesized in and processed by the smooth endoplasmic reticulum and Golgi apparatus? A. lipids and steroids B. DNA polymerase and RNA polymerase C. lysosomal enzymes D. cytoskeletal proteins 30. Which of the following are processed in the Golgi apparatus? A. integral membrane proteins of the plasma membrane B. proteins that are secreted from the cell C. proteins that will be broken down by lysosomes D. all of the above E. none of the...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
1. Which of the following is not considered a nutrient a Vitamin B. Water c.Carbohydrate (d)...
1. Which of the following is not considered a nutrient a Vitamin B. Water c.Carbohydrate (d) Alcohol e Mineral 2. For which of the following causes of death does a person's diet play a part? a. Lung disease (6) Cancer Chronic lower respiratory diseases d. Infections of the blood e AIDS 3. Researchers repeatedly report that people who consume a variety of foods such as fruits, vegetables, legumes, nuts, and whole grains have reduced risks of which of the following...
1. Which of the following are the sites within the human body where carbon dioxide and...
1. Which of the following are the sites within the human body where carbon dioxide and oxygen are exchanged? A. Alveoli B. Arteries C. Synapses D. Venules 2. Which of the following describes the most important reason for repeating an experimental investigation? A. To verify the validity of the original findings B. To expand upon the original investigation C. To manipulate the independent variable D. To attempt to disprove the hypothesis 3. Lithium has an atomic number of 3 and...
thats all the information that he gave us to solve the question. Thank you for trying...
thats all the information that he gave us to solve the question.
Thank you for trying anyways
X C E Question 23 1 pts The free-energy changes for the transfer of individual amino acid residues from a hydrophobic to an aqueous environment are given as follows: Amino acid AG of transfer (kJ/mol Proline -0.8 -12.6 Histidine 6.7 Alanine Methionine 14.3 Based on this information, which of these amino acid pairs is MOST likely to be represented in membrane-spanning alpha helices?...
4. Which of the nuclides below would you predict to be stable? 166 48 32 60 (b) 19K (c) 18Ar 92 46 32 (e) 16
help!!
1. The two rarest naturally occurring elements are astatine (At. Element 85) and francium (Fr, element 87). Both are very short-lived, undergoing radioactive decay rapidly. For astatine, the longest-lived isotope is 210 At, with a half-life of 8.1 hours. For francium, the longest- lived isotope is 223Fr, with a half-life of 22 minutes. Despite 210 At having a longer half-life than 223Fr, there is much less astatine than francium on Earth (approximately 1 ounce of astatine compared to 30...
Hello, I was wondering if you could check my answers
27. Within wi:1.PBLSteatorn withthe Small stttomic radius a) Bi c) As 2nd is Sma lles S mall 28. Within Group 14, which of the following is the, most metallic elemen b Si Ge 29. Which of the following has an ionic radius that is smaller than its atomic radius? a) neon Nc nitrogen c) sodiuma sulfur 30. Which of the following molecules does not have a polar covalent bond? a)...
need help with 1-21
1) Label the steps below as "slow" and "fast". HCH 013 10 = H. C + + H-LG H-LG 2) Why are they slow/fast? Explain using chemical terms. Stereochemistry of the Sn1 reaction 3) What type of intermediate does the Sn1 reaction proceed through? 4) What is the geometry of the carbon that the nucleophile coordinates to in the 2 step? 5) From how many directions would it be reasonable for the nucleophile to approach the...
Use the following information about Company X to help answer problems 1-10. Company X went public at the start of 2016, $100M shares of stock were issued at $18.60 per share. At the end of 2016, Company X traded at $20.00 per share. During 2017, Company X issued 5 shares at $20.00 per share, thus raising $100M of capital At the end of 2017, Company X traded at $20.46 per share. A summary of Company X's 2016 and 2017 10k...
29. Which of the following would be synthesized in and processed by the smooth endoplasmic reticulum and Golgi apparatus? A. lipids and steroids B. DNA polymerase and RNA polymerase C. lysosomal enzymes D. cytoskeletal proteins 30. Which of the following are processed in the Golgi apparatus? A. integral membrane proteins of the plasma membrane B. proteins that are secreted from the cell C. proteins that will be broken down by lysosomes D. all of the above E. none of the...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
1. Which of the following is not considered a nutrient a Vitamin B. Water c.Carbohydrate (d) Alcohol e Mineral 2. For which of the following causes of death does a person's diet play a part? a. Lung disease (6) Cancer Chronic lower respiratory diseases d. Infections of the blood e AIDS 3. Researchers repeatedly report that people who consume a variety of foods such as fruits, vegetables, legumes, nuts, and whole grains have reduced risks of which of the following...
thats all the information that he gave us to solve the question.
Thank you for trying anyways
X C E Question 23 1 pts The free-energy changes for the transfer of individual amino acid residues from a hydrophobic to an aqueous environment are given as follows: Amino acid AG of transfer (kJ/mol Proline -0.8 -12.6 Histidine 6.7 Alanine Methionine 14.3 Based on this information, which of these amino acid pairs is MOST likely to be represented in membrane-spanning alpha helices?...
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