BIOL 1001 Chapter : Biol 1201 Outline2
Document Summary
>>>>>an understanding of chemistry is important because an interaction between atoms is one of the lowest levels of biological organization. Approximately 25 of the elements are essential for life. Of those the most biologically important by percentage are (see table 2. 1): The 3 most stable subatomic particles are: neutrons, protons, and electrons. (see fig 2. 5) --dalton is a mass unit for subatomic particles. --ion: atom that has either negative or positive charge. --isotopes: same ions with different amount of. --radioisotopes: unstable isotopes that either break down into different isotopes of that atom or into a completely different atom. >>>>>>>a reactive atom will try and fill it"s valence shell by interacting with other atoms. This interaction (bonding) may result in two atoms forming a chemical bond (see fig. If the electronegativity of an atom is much greater than the electronegativity of another atom that an electron transfer will occur.
