Physical property of a substance is that property which can only be observed but cannot be changed. They include color, volume and weight. On the other hand, a chemical property is that property of a substance which can only be observed through changing the chemical composition of the substance.
Difference between physical and chemical reactions
A physical reaction does not evolve a new matter. A chemical reaction on the other hand produces a new substance.
How different an element is from a compound
An element is a pure chemical material composed of the same type of atom. A compound on the other hand is entailed of atoms of unlike elements that are chemically combined together.
Elements in the human include Oxygen and Carbon. Oxygen is a respiratory gas while carbon is the basic building block for proteins, carbohydrates and fats. Compounds in the body include water and proteins. Water helps in the metabolic reactions in the body while proteins are the tissues and keratins in the body
Analysis of the properties of the selected atoms and ions
Oxygen is a gaseous element and is of interest due to its respiratory and combustion functions. Oxygen compound is normally in form of the diatomic (O2) or tri-atomic (O3) molecules. Carbon on the other hand exists in two allotropic forms: diamond and graphite. Carbon mostly reacts with oxygen to form CO2.
Difference between biochemical, pharmaceutical and diagnostic chemical reactions
A biochemical reaction is one in which two or more molecules react with the aid of an enzyme to form products. Alternatively, a biochemical reaction may involve the breakdown of a compound to form multiple products. A pharmaceutical reaction is a biological reaction which yields drugs for human consumption. A diagnostic reaction is one which is administered to people to prevent diseases or allergic reactions.
Example of biochemical reaction include: respiration and photosynthesis. The processes above are metabolic reactions in the bodies of living things. For survival, the processes above must occur. Example of pharmaceutical reactions includes the manufacture of aspirin, which is a drug used to treat arthritis, pain and inflammation. An example of a diagnostic reaction is the one
Classes of catalyst
There are two main types of catalyst. The first one is the homogenous catalyst. This is whereby the catalyst is in the same phase with the reactants. The second one is the heterogeneous catalyst. This is whereby the catalyst is in different phases with the reactants.
Catalysts in the human body
Examples of the catalysts in the body are amylase and lipase. Amylase aids in the breakdown of starch to maltose while lipase breaks down lipids to glycerol and fatty acids.
Reference
Atkins, P. A. (1998). Physical Chemistry. Princeton, NJ: Educational Testing Services
Knapp, G. (2002). The Biological Chemical Reactions. Journal of the chemical reactions, 6,
118-121. Retrieved May 2,2013 from PsycINFO database
Raymond, C. (2008). Organic Chemistry. New York: Pantheon.
Wilson, F. (2005). The Manufacture of Biomedical and Pharmaceutical Drugs. Baltimore: Johns
Hopkins UP.
Wagner,E., Lawrick, E. (2013, May 1). General format. Retrieved from
http://www.lenntech.com/periodic/elements/o.htm
