Cambell Biology 7th edition Chemistry notes
The Chemical Basis of Life ?We are stardust? nasa.gov Students should be able to: Define: element, atom and molecule Name the components of atoms and their physical arrangements. Draw a diagram of an atom, given the atomic number. Distinguish between the types of chemical bonds. Element: a substance that cannot be broken down to other substancesPeriodic Table: organizational chart of all the elements http://www.periodictable.com/ Table 2.1 5 Table 2.1 Elements In the Human Body ATOM: from Greek atomos, ?unable to be cut? Atomic Structure An atom is the smallest unit of matter that still retains the properties of an element. Three subatomic particles in atoms are relevant to our discussion of the properties of elements. Protons are positively charged.