BIO 110 Chapter Notes - Chapter 2: Deoxyribose, Amphiphile, Glycosidic Bond
Document Summary
Chapter 2 - the chemistry and energy of life. Concept 2. 1 - atomic structure is the basis for life"s chemistry. Living and nonliving matter is composed of atoms. Nucleus - dense, positively charged part of an atom. Electrons - negatively charged particles w/ negligible mass. Protons - positively charged particles w/ mass of 1 dalton (da) Neutrons - no electrical charge w/ mass of 1 dalton (da) Opposite charge attract / like charges repel. Element - a pure substance that contains only one kind of atom. Life is mostly made up of c, h, n, o, p, s. Physical and chemical properties depend on number of protons, neutrons, and electrons. Atomic number - the number of protons in an atom. Mass number - the total number of protons and neutrons in an atom. Isotopes - atoms with the same number of protons but differ in number of neutrons. Electrons determine how an atom will react.
