KINE 2011 Chapter Notes - Chapter 2: Ribose, Disulfide, Active Transport
9 Mar 2013
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Document Summary
A unit of matter that forms all chemical substances. Atomic nucleus is the small volume at the center of the atom. Atomic weight scale indicates an atoms mass relative to the mass of other atoms. Atomic weight scale is a ration of atomic masses, it has no absolute units. The nucleus has a net positive charge equal to the number of protons it contains. The atomic number is how many protons each element has mass is known as a dalton. One dalton (d) equals one-twelfth the mass of a carbon atom (carbon has an atomic weight of 12, and a carbon atom has an atomic mass of 12 daltons) Table 2-1 essential chemical elements in the body: Major elements are: hydrogen (63%), oxygen (26%), carbon (9%) and nitrogen (1%). These elements make up 99. 3% of total atoms in the body. Many chemical elements can exist in multiple forms called isotopes.
