Environment First Homework

2 section 31 question 1 hydrogen is the simplest

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2) Section 3.1 Question #1: Hydrogen is the simplest element; it has an atomic number of 1. There are three hydrogen isotopes: 1 H, 2 H and 3 3. Explain how these isotopes differ with respect to their number of protons, neutrons, and electrons. The number of protons and electrons never changes in an element, but the number of neutrons can fluctuate, causing an isotope to form. With the hydrogen molecule, there are three isotopes. The 1 H molecule has each one proton, neutron, and electron. The 2 H molecule, however, has two neutrons compared to just one proton and electron, and the 3 H isotope has three neutrons compared to just one proton and electron. The only difference in these isotopes is that the isotopes with more neutrons are bigger than the
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other isotopes, allowing chemists to determine how much of each isotope is in a sample of a particular element. 3) Section 3.2 Question #1: Describe three different kinds of carbohydrates. Carbohydrates are molecules that consist of carbon, hydrogen, and oxygen. These carbohydrates are often referred to as sugars, which are carbohydrates with the general chemical formula of (CH 2 O) n . Glucose (C 6 H 12 O 6 ) is a form of sugar that is a basic form of energy for some organisms and can be used in the synthesis of other molecules. Ribose (C 5 H 10 O 5 ) and deoxyribose (C 5 H 10 O 4 ) are other kinds of carbohydrates and are 5-carbon sugars that are very important. 4) Section 3.3 Question #3: Photons of gamma rays, X-rays, and UV light are damaging to living systems. Why? The colors that we are able to see fall into the middle of the electromagnetic spectrum because their wavelengths are not too short or too long, making them visible to us in light. Infrared rays, microwaves, and radio waves all consist of wavelengths longer than visible light and hold less energy. Ultraviolet (UV), X-rays, and gamma rays lie on the other end of the spectrum and have wavelengths that are shorter than visible light. The photons in these forms of radiation contain more energy than visible light and have the ability to disrupt the bonds in many organic molecules. Because they have the ability to do this, these forms of radiation are harmful to living systems.
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5) Section 3.4 Question #1: Describe the reasons why scientists think it is unlikely that life will be found on Jupiter, Pluto, or Mercury. To the knowledge of man, there is only one planet in our solar system that has existence of life and that planet is Earth. Earth lies as a perfect distance from the sun as 93 million miles compared to a planet like Mercury, the closest planet to the sun, that is only 32 million miles away from the sun and therefore would not be able to support life due to its heat. Jupiter and Pluto have the opposite issue as even Jupiter, which orbits the sun at 483 million miles away, receives only 1% the amount of sunlight that Earth does, which is not nearly enough to sustain life. Pluto is the farthest planet from the sun and clearly cannot support existence to living things if Jupiter can’t.
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  • Fall '12
  • Brooks
  • Economic system, Planned economy

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