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Ionic Bonding Introduction
Transcript of Ionic Bonding Introduction
You will be able to explain how an ionic bond is formed.
You will be able to identify a cation and an anion.
You will be able to diagram the Lewis Dot structure of an element. Diagramming Lewis Dot Structures The Formation of Ions Formation of a Cation Cation - the formation of a positive ion; an atom loses an electron 7.1 Introduction Ionic Bonding Valance electrons are the electrons used to form chemical bonds. How does the group number relate to the number of valance electrons?
(s- and p- orbitals only) Dots = valance electrons
Add one dot at a time.
Do not pair up dots until you make one whole trip around the symbol. Diagram the first 18 elements. What do you notice about the Lewis Dot structure for each element in the groups? Transition Metals Due to the electron configuration of transition metals they may have various cations.
Iron can form a cation of +2 or +3. We indicate this as Iron (II) and Iron (III).
Some transition metals do not reach a noble gas electron configuration and therefor are exceptions to the octet rule. Anion Formation Anion - the formation of a negative ion; when an atom gains an electron