Campbell Essential Biology (7th Edition)
7th Edition
ISBN: 9780134765037
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 10SQ
Explain why it is unlikely that life could exist on a planet where the main liquid is methane, a nonpolar molecule that does not form hydrogen bonds.
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Chapter 2 Solutions
Campbell Essential Biology (7th Edition)
Ch. 2 - An atom can be changed into an ion by adding or...Ch. 2 - If you change the number of _____ the atom becomes...Ch. 2 - A nitrogen atom has 7 protons, and the most common...Ch. 2 - Why are radioactive isotopes useful to tracers in...Ch. 2 - What is chemically nonsensical about this...Ch. 2 - Why is it unlikely that two neighboring water...Ch. 2 - Which of the following is not a chemical reaction?...Ch. 2 - Some people in your study group say they dont...Ch. 2 - Explain how the unique properties of water result...Ch. 2 - Explain why it is unlikely that life could exist...
Ch. 2 - A can of cola consists mostly of sugar dissolved...Ch. 2 - For each statement, identify which major theme is...Ch. 2 - For each statement, identify which major theme is...Ch. 2 - For each statement, identify which major theme is...Ch. 2 - Animals obtain energy through a series of chemical...Ch. 2 - Interpreting Data. As shown in Figure 2.17,...Ch. 2 - Critically evaluate this statement: Its paranoid...Ch. 2 - A major source of the CO2 that causes ocean...
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- Draw a shell model of an uncharged nitrogen atom. Hint: Nitrogen has seven protons.arrow_forwardA. The first shell corresponds to the first energy level, and it can hold up to 2 electrons. Hydrogen has one proton, so it has 1 electron and one vacancy. A helium atom has 2 protons, 2 electrons, and no vacancies. B. The second shell corresponds to the second energy level, and it can hold up to 8 electrons. Carbon has 6 electrons, so its first shell is full. Its second shell has 4 electrons and four vacancies. Oxygen has 8 electrons and two vacancies. Neon has 10 electrons and no vacancies. C. The third shell corresponds to the third energy level, and it can hold up to 8 electrons. A sodium atom has 11 electrons, so its first two shells are full; the third shell has one electron. Thus, sodium has seven vacancies. Chlorine has 17 electrons and one vacancy. Argon has 18 electrons and no vacancies. Figure It Out: Which of these models have unpaired electrons in their outer shell?arrow_forwardScenario Three Read the following extract: “Atmospheric ions are electrically charged particles which occur naturally in the atmosphere. They form in the upper atmospheric layers mainly because of the action of ultraviolet radiation from the sun, as well as in lower atmospheric layers as a result of radioactive radiation and cosmic rays. These cause ionisation of neutral molecules or atoms. As a result, ions are formed. These ions almost instantaneously combine to form molecules with ionic bonds.” The extract mentions ‘ions’. Explain what these are in terms of their electronic structure, and how this is different from an atom. The extract mentions ‘ionic bonds’. Explain what these are, and how they form in terms of electron structure. Scenario Four Read the following extract: “A polymer is a substance which has a molecular structure comprising of a large number of identical molecules covalently bonded together to form a long chain structure. Many synthetic organic materials are…arrow_forward
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- Like oxygen, sulfur forms two covalent bonds. However, sulfur is far less electronegative. In fact, it is approximately as electronegative as carbon. How would the properties of the various classes of biological molecules be altered if you were to replace all the oxygen atoms with sulfur atoms?arrow_forwardAs scientists continue exploring other planets and our solar system, they seek evidence to prove that life has existed. Which molecules should scientists look for?arrow_forwardDraw a shell model of a lithium atom (Li), which has three protons, then predict whether the majority of lithium atoms on Earth are uncharged, positively charged, or negatively chargedarrow_forward
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