Chemistry Essay

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| 2.3.5 Practice: Proteins Enzymes and Water | Practice Assignment | | | | | Biology (S1808013) | Aleasha King | | | Points possible: 25 | Date: ____________ | | 1. a) Carbon has six protons, six neutrons, and six electrons. Oxygen has eight protons, eight neutrons, and eight electrons. Draw each of these atoms. (1 point) HINT: Think about the smaller numbers in each element as the number of electrons and the larger as the number of protons and neutrons. b) Circle or highlight the six most common elements found in living things. Do the same thing for the five other elements that are also found in the body in smaller quantities. (1 point) HINT: Think about the symbols for carbon, hydrogen, oxygen, nitrogen, phosphorus, chlorine, magnesium, sulfur, sodium, and potassium c) Explain how humans obtain the energy and matter they need in order to survive. (1 point) HINT: Think about the chemical bonds and what happens to atoms in your body. The food we eat gives us carbohydrates, lipids and other nutrients to carry out the process of life. d) Why is water so important to all living things? (1 point) HINT: Think about what organisms are made of. Living things such as plants need water to grow and produce flowers, fruits, vegetables, etc. Living things such as humans need water to rehydrate and lubricate their bodies, skin, tissue, joints, and brain. We cannot function without it. 2. a) Use a diagram to show how ions are formed when a sodium atom comes into close contact with a chlorine atom. (2 points) HINT: Think about opposite charges. Use the information from the passage to answer the following questions Supramolecular chemistry involves the study of noncovalent interactions within and between molecules. For years chemists have focused on studying molecules and compounds that are held together by covalent bonds and

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