Running Head: W3DQ 1 W3DQ [STUDENT’S NAME] [INSTITUTION AFFILIATION] [DATE] W3DQ 2 What are the differences between physical and chemical properties in chemistry? Physical properties in chemistry are the properties that can be measured or observed without alterations to the composition of the substance. Examples of physical properties of substances include; boiling points, freezing points, mass, density etc. On the other hand, chemical properties are the properties that can only be observed during a chemical reaction and always result in alterations in the chemical composition of the substance. They include; the heat of combustion, types of bonds formed after reactions, flammability etc. (Physical and Chemical Properties, n.d.). What are the differences between physical and chemical reactions in chemistry? Chemical reactions in chemistry are those reactions that take place when molecules of a substance are chemically changed due to interacting with each other i.e. breaking of molecular bonds. On the other hand, physical reactions in chemistry are those reactions that take place when the molecules of a substance are rearranged only and not when the molecules are chemically altered as in chemical reactions. What are the characteristics that make elements different from compounds? Give two examples of each that exist in the human body and explain their function. Elements are pure chemical substances that have been made up of one similar atom while compounds are substances made up of different elements that have been combined together in a fixed ratio through chemical bonds. W3DQ Examples of elements and compounds in the human body and their functions Elements Oxygen which has an atomic number 8 and is the most abundant element in the body and it's majorly used in aerobic cellular respiration Carbon which has an atomic number 6 and the second most available element found in the body is majorly used to form chain and ring structures that are the building blocks for all metabolic reactions in the body. Compounds Carbohydrates which constitute of sugars and starch are required in the human body since they are a source of energy. Water which is the most abundant compound in the body functions to ensure there is fluid balance in the body or at times as a transporting agent. (Compound vs Element, n.d.). An analysis of the properties of the selected atom and its most common ion. Iron Iron comprises of 8 isotopes with an atomic number of 26.its chemical symbol is Fe and has a crystalline like structure and silver in color. Iron has a high melting point (1535.0 °C) and high boiling point (2750.0 °C) .Iron consists of two most common ions i.e. Fe (II) and Fe (III). An explanation of the difference between the stabilities of the selected atom and its most common ion 3 W3DQ 56 4 Fe is the most common isotope of iron and has the best binding energy per nucleon hence making its nucleus be efficiently bounded and thus could be considered to be the most stable .Fe (II) is highly soluble in water while Fe (III) is insoluble in sea water hence improving its stability. A description of a process in the human body that is impacted by the atom and its most common ion differently Iron is of critical importance to the human body since it facilitates oxygen transportation in the blood and oxygen storage in the muscular tissues.it takes place in the hemoglobin from the iron sources in the liver and bone marrow, and it is during this hemoglobin synthesis that allows for oxygen transportation in the bloodstream in the entire body. Lack of iron in the body would result in a reduction in the rate of formation of hemoglobin molecules that carry oxygen in the blood hence a person suffers anemia and in its severe cases may lead to death. (Walczyk, 2002). W3DQ 5 References Compound vs Element. (n.d.). Retrieved from Diffen: http://www.diffen.com/difference/Compound_vs_Element Helmenstine, A. (2016, October 25). Elements in the Human Body and What They Do. Retrieved from SCIENCE NOTES- Learn About Science-Do Science: http://sciencenotes.org/elements-in-the-human-body-and-what-they-do/ Physical and Chemical Properties. (n.d.). Retrieved from NDT Resource Center: https://www.ndeed.org/EducationResources/CommunityCollege/Materials/Physical_Chemical/PhysicalPr operties.htm Walczyk, T. (2002, March 15). Natural Iron Isotope Variations In Human Blood. Retrieved from SCIENCE AAS: http://science.sciencemag.org/content/295/5562/2065.full
