- the electrons in the outermost shell determine the bonding. the # of electrons in the outermost
shell determines the element’s chemical properties (stable or reactive).
- if it isn’t full, it isn’t stable.
- atoms want to fill the outershell. it’s not a comfortable state to exist with missing outershell
electrons. (it’s not really missing, it’s incomplete. That’s the way that element exists naturally)
- the octet rule: the outer e- shell is complete when it contains 8 e-, except for H & He; the
outer shell of H & He is complete with 2 e-
- READ on ionic bond, covalent bond, hydrogen bond & water. (Chapter 2)
Bio Notes 8/30/12
- take quiz tomorrow on blackboard!
- electrons in the outermost shell have the most energy
- if the outershell is full, it’s chemically inert. It’s incredibly hard to get it to react.
- if the outershell isn’t filled, the atom is chemically reactive.
- a molecule is we call two or more atoms that