Ionic Bonding Notes PDF

Ions, Ionic Bonds & Ionic Formulas Unit 4, Notes 1 WHY DO ATOMS FORM BONDS WITH EACH OTHER??? Ions and the Octet Rule Octet Rule: Atoms form bonds to arrive at a full valence...

Ions, Ionic Bonds & Ionic Formulas Unit 4, Notes 1 WHY DO ATOMS FORM BONDS WITH EACH OTHER??? Ions and the Octet Rule Octet Rule: Atoms form bonds to arrive at a full valence shell of electrons- to achieve stability!! Valence Electrons (outermost s & p orbitals) Electrons responsible for & involved in bonding! Ions Typically Formed Ionic Compounds: Have high melting and boiling points Conduct electricity in water- dissociate into Ions and opposite charges attracted to electrodes. Crystal Lattice Properties of Ionic Compounds Cl- cations Na+ Greater the charge- the stronger the bond! +1 -1 +3 -3 Li Cl -vs- Al N LiCl < AlN Aluminium Nitride has stronger bonds!  Electron Dot diagrams A way of keeping track of valence electrons. How to write them: ◦ Write the symbol. ◦ Put one dot for each valence Xe electron ◦ Don’t pair up until they have to Write the electron dot diagram for Na F Mg Ne C P O Ionic Bonds: Transfer electrons! A way for atoms to achieve stability! 1+ 1– 1s222s 1s 2s222p 2p663s1 1s 2 1s22s2s222p 2p663s 3s223p 3p56 Ionic Bond Example: Mg wants to lose 2 electrons to be more stable, Oxygen wants to gain 2 electrons to be more stable. Ionic Bonding & Introduction to Ionic Formulas For each pair of elements below draw a dot diagram showing the transfer of valence electrons. Draw arrows to show where and how the outer electrons will go and transfer during an ionic bonding reaction. 1. Li + Cl => LiCl You Try! 2. Be + F => BeF2 Al + O => ??? Al + Cl => ??? Ionic Bonding Puzzle Activity Ionic Bonding Puzzle