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In the periodic table, WHO is the most stable? Noble Gas

Everybody wants to be NOBLE! By FORMING BONDS with other atoms! - So that each atom can have noble gas configuration (full shell) HOW?

So what is a chemical bond ? which hold atoms together Forces of Attraction

Valence Electrons outermost electrons When atoms form bonds , only their outermost electrons are involved. So what is a chemical bond ?

By GAINING electrons By LOSING electrons By SHARING electrons IONS So what is a chemical bond ? Ways to form bonds

What are ions and how are they formed? What is ionic bond , ionic bonding and ionic compound ? Suggest the type of elements that is involved in ionic bonding Drawing of “Dot and Cross” diagram to represent ionic bonding The presence of giant lattice in ionic compounds

What are ions and how are they formed?

What is ionic bond , ionic bonding and ionic compound ?

Suggest the type of elements that is involved in ionic

bonding

Drawing of “Dot and Cross” diagram to represent ionic

bonding

The presence of giant lattice in ionic compounds

atoms positive ions negative ions Groups I, II forms Groups VI, VII non-metals metals Lose e to become Gain e to become forms

Where did the electrons lose by the metals go to? Where did the electrons gained by the non-metals come from? How do atoms interact with each other?

Hi Everyone, Nice to meet you… Do you know who am I? Am I a metal or non-metal? How many valence electrons do I have? What should I do to achieve complete electronic structure? Na 1 By losing 1 electron

Hi Everyone, Do you know who am I? Am I a metal or non-metal? How many valence electrons do I have? What should I do to achieve complete electronic structure? Cl 7 By gaining 1 electron x x x x x x x x x x x x x x x x x

Oh Thank you very much!!! Let me give you my electron! Na becomes positively charged ions. Cl becomes negatively charged ions. + - Na Cl x x x x x x x x x x x x x x x x x

You are attractive! When Oppositely charged ions see each other… They Attract Each Other So are you! - Cl - x x x x x x x x x x x x x x x x x Na + +

Positive sodium ions & negative chloride ions are attracted to one another by electrostatic attraction to form sodium chloride. Ionic bond  electrostatic forces of attraction between the positive ion and negative ion . + - + - + - - + + - + - - + + - + + + + + + + + - - - - - - - -

Ionic compound  A compound that contains ionic bonds. Giant lattice  millions of sodium and chloride ions are arranged in an orderly manner. These ions are held in place by ionic bonds throughout the entire lattice.

Ionic bonding  process where there is a transfer of electrons from a metal to a non-metal . ‘ Ionic’ Workout 1 Identify which of the following compound is ionic. H 2 NaC l MgBr 2 CaC l 2 MgO CH 4 CO 2 H 2 O

Step 1: Write the legend. Step 2: Draw the positive ion. Step 3: Draw the negative ion. ‘ Ionic’ Workout 2 Draw the ‘dot and cross’ diagram for the following compound. ‘ Dot and Cross’ diagram Compound 1: MgO

Compound 2: CaC l 2 Compound 3: A l C l 3

Compound 4: Na 2 O

Atoms form ions by gaining/losing electrons. One atom loses electrons to form a positive ion. Another atom gains electrons to form a negative ion. Ions have electronic structures of noble gases .

Ionic bonding is the process where there is a transfer of electrons from a metal to a non-metal . Ionic bond is the electrostatic forces of attraction between the positive ion and negative ion . The structure of an ionic compound is a giant lattice.