BIOL 1201 Chapter : Ch 2 Biology
Document Summary
>>>>>an understanding of chemistry is important because an interaction between atoms is one of the lowest levels of biological organization. --matter- anything that takes up space and has mass. 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. >>>>>>>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. The atom with the lower electronegativity will transfer an electron to the atom with the greater electronegativity. After the transfer both atoms will have a charge.
