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3. Why might arsenic be able to substitute for phosphorus?

3. Why might arsenic be able to substitute for phosphorus?

Chemistry
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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Open Sans BIUA 11 bectrium life. have more stability than than arsenate ion because as the size of phosphorus is small as compared to arsenic so it have high electron density and have high electronegativity than arsenic and phosphate ion is stabilized by hydrogen bonding also. 3. Why might arsenic be able to substitute for phosphorus? 4. What types of bonds, and how many bonds, will arsenic form with other elements? think the physical properties (solubility in water conductivity, boiling & Melting points) of arsenic trichloride (ASCI,) would compare to those of phosphorus trichloride (PCI,? 5. How do you SYNTHESIZE Underneath the article is a "Note." Be sure to read it and answer these two questions. 6. This article got a huge amount of international attention. Why? What does it mean that scientists "could not replicate the findings?"
Transcribed Image Text:Open Sans BIUA 11 bectrium life. have more stability than than arsenate ion because as the size of phosphorus is small as compared to arsenic so it have high electron density and have high electronegativity than arsenic and phosphate ion is stabilized by hydrogen bonding also. 3. Why might arsenic be able to substitute for phosphorus? 4. What types of bonds, and how many bonds, will arsenic form with other elements? think the physical properties (solubility in water conductivity, boiling & Melting points) of arsenic trichloride (ASCI,) would compare to those of phosphorus trichloride (PCI,? 5. How do you SYNTHESIZE Underneath the article is a "Note." Be sure to read it and answer these two questions. 6. This article got a huge amount of international attention. Why? What does it mean that scientists "could not replicate the findings?"
E Copy of SAS 1-11- Go X E Copy of 11 Rea IM3 Desmos Activity X by of 11.4 Reading x COIYC-ISOOBC3WZM7Z2-CGittNfvx118hmpq4/edit O (535) You Tube Ed Club Math ch for Life Lesson 11: Reading - Using Arsenic Instead of Phosphorus NASA Scientists's Puzzling Discovery Adapted from A Bacterium That Can Grow by Using Arsenic Instead of Phosphorus and NASA Finds New life (Science, Wolfe-Simon et al., 2011) It is known that all life on Earth is composed of six elements: carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. But a team of scientists at NASA have made a surprising and puzzling discovery in Mono Lake, California in 2011. This discovery is being called "life as we do not know it" by NASA. The NASA scientists thought they found a bacterium able to substitute arsenic for phosphorus in some macromolecules, specifically lipids, nucleic acids, and proteins. In these macromolecules, arsenate can be found in the place of phosphate. While other elements have been found to substitute in living things, such as other metals replacing iron as the oxygen-carrying element in some organisms, this bacterium was thought to be the first living thing found to have a replacement for one of the six essential elements for life. This is not a perfect substitution. In laboratory experiments, arsenate was found in the bacterium only when bacteria were grown in an environment lacking in phosphorus. The arsenate ion (Aso,) is not as stable as the phosphate ion (PO), arsenic is much more toxic than phosphate, and it is thought that some biological processes are not compatible with arsenic-substituted molecules. Despite the unknowns, this was still thought to be a remarkable discovery. The existence of an organism on Earth that can substitute for one of the six essential elements would suggest that the search for life beyond Earth may not be limited to just those six elements. Note: This study could not be replicated after 2011, and other studies have found that there has indeed been phosphorus in the organisms in Mono Lake, indicating that the organisms are not including arsenic in their DNA. References Diaz, J. (2010, December 2), NASA Finds New ufe. Gmodo. bis mona.com/naao nliutaten 04.AE 2Voite-Simon,F. et al (2011) A bacterium that can graw by using arsenic instead of phosphorus. Srlence. Rettleved July 27, 2020, tram
Transcribed Image Text:E Copy of SAS 1-11- Go X E Copy of 11 Rea IM3 Desmos Activity X by of 11.4 Reading x COIYC-ISOOBC3WZM7Z2-CGittNfvx118hmpq4/edit O (535) You Tube Ed Club Math ch for Life Lesson 11: Reading - Using Arsenic Instead of Phosphorus NASA Scientists's Puzzling Discovery Adapted from A Bacterium That Can Grow by Using Arsenic Instead of Phosphorus and NASA Finds New life (Science, Wolfe-Simon et al., 2011) It is known that all life on Earth is composed of six elements: carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. But a team of scientists at NASA have made a surprising and puzzling discovery in Mono Lake, California in 2011. This discovery is being called "life as we do not know it" by NASA. The NASA scientists thought they found a bacterium able to substitute arsenic for phosphorus in some macromolecules, specifically lipids, nucleic acids, and proteins. In these macromolecules, arsenate can be found in the place of phosphate. While other elements have been found to substitute in living things, such as other metals replacing iron as the oxygen-carrying element in some organisms, this bacterium was thought to be the first living thing found to have a replacement for one of the six essential elements for life. This is not a perfect substitution. In laboratory experiments, arsenate was found in the bacterium only when bacteria were grown in an environment lacking in phosphorus. The arsenate ion (Aso,) is not as stable as the phosphate ion (PO), arsenic is much more toxic than phosphate, and it is thought that some biological processes are not compatible with arsenic-substituted molecules. Despite the unknowns, this was still thought to be a remarkable discovery. The existence of an organism on Earth that can substitute for one of the six essential elements would suggest that the search for life beyond Earth may not be limited to just those six elements. Note: This study could not be replicated after 2011, and other studies have found that there has indeed been phosphorus in the organisms in Mono Lake, indicating that the organisms are not including arsenic in their DNA. References Diaz, J. (2010, December 2), NASA Finds New ufe. Gmodo. bis mona.com/naao nliutaten 04.AE 2Voite-Simon,F. et al (2011) A bacterium that can graw by using arsenic instead of phosphorus. Srlence. Rettleved July 27, 2020, tram
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