Metallic bond was defined as a type of chemical bond formed between the positively charged ions (+) and the free-floating electrons (e) in a lattice structure. It was also mentioned that the structure of a metallic bonds is very different from that of ionic and covalent compounds. In metallic bond the valence electrons of the interacting metal atoms are delocalized

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What is covalent bond?
Covalent bonds are formed when pair
of electrons are shared between
atoms.

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What elements are involved in
covalent bond?
Non metal + Non metal
Metalloid + Non metal

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Can you give some properties of
covalent compound?
• Exist as solid, liquid or gas
• Low melting and boiling point
• Poor conductor of electricity

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M_t_l_i_
METALLIC

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B_N_I_G
BONDING

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M_l_e_b_e
Malleable

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D_c_i_e
Ductile

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M_t_l_
Metals

13. Metallic
Bonding

14. What is Metallic Bond?
• A metallic bond is the type of chemical
bond formed between the positively charged
ions (+) and the free floating electrons (e) in
a lattice structure.

15. METALLIC BOND

16. Metallic Bond Structure

17. How does metallic bond work?
The structure of a
metallic bonds are very
different from that of
ionic and covalent
compounds. In metallic
bond the valence
electrons of the
interacting metal atoms
are delocalized.

18. IONIC BOND METALLIC BOND

19. Sample Metallic Bond

20. Properties of Metallic Bond

21. Electrical Conductivity
Metals are good conductors of
heat and electricity

22. Why metals are good conductors of
electricity?
What have you notice on the movement
electrons? Can they freely move or not?

23. Metal Conducts Electricity
When an electric field is applied to a
metal, one end of the metal becomes
positive and the other becomes negative.
Since the electrons are free to move, all
the electrons experience a force toward
the positive end. The movement of
electrons is an electric current.

24. Thermal Conductivity
• Metals are good conductors of heat because the
positive metal nuclei are close together and can
easily transfer the heat.

25. Thermal Conductivity
Electrons are able to gain kinetic energy in
hotter areas of the metal and are able to
quickly transfer it to other parts of the metal
lattice because of their freedom of movement.
Heat causes the electrons to move faster and
the ‘bumping’ of these electrons with each
other and the protons transfers the heat.

26. Malleability
• What does malleable means?
• Malleable means they can be molded into
different shapes.

27. What makes metals malleable?

28. METALLIC IONIC

29. Ductility
• What does ductile means?
• Ductile means they can be stretched into
wires

30. What makes metal ductile?

31. Lustrous
• How can you define the word
lustrous or luster?
• Lustrous is defined as metals that
have a shiny appearance. The shiny
appearance of the metals is called
metallic lustre.

33. Melting and Boiling Point
• High Melting and Boiling point due to
strong attraction between positively charged
ions and free floating electrons

34. High Melting Point
The generally high melting points indicate that
metallic bonding is quite strong.
Melting points increase with an increase in the
number of valence electrons to the sea, since there is
a greater attractive force between the cations and the
electrons.

35. Uses of Metals

36. Copper (Cu)

37. Aluminum (Al)

38. Gold (Au)

39. Iron (Fe)

40. Nickle (Ni)

41. Silver (Ag)

43. What is metallic bond?
It is the type of chemical bond formed
between the positively charged ions (+)
and the free floating electrons (e) in a
lattice structure

44. What elements are involved in metallic
bond?
Metal + Metal

45. What can you say on the electrons in
metallic bond?
Delocalized

46. What are the properties of metallic
bond?
• High Conductor of Electricity
• High melting and boiling point
• Good Thermal Conductor
• Malleable
• Ductile
• Lustrous

47. Metallic Bonds Properties
Bond Formation
e- are delocalized among metal
atoms
Occurs Between 2 Metals
Type of Structure “Electron Sea”
Electrical Conductivity High
Thermal Conductivity High
Melting Point Very High
Boiling Point Very High
Other Properties Malleable, Ductile, Lustrous

48. Activity Time
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IONIC BOND COVALENT BOND METALLIC BOND
-transferring of electrons -sharing of electrons -sea of electrons
Metal + Nonmetal Nonmetal + Nonmetal or
Metalloid + Nonmetal
Metal + Metal
Exist in solid state only Exist as solid, liquid or gas Exist as solid state
Hard and Brittle Relativity soft Not very hard
High Conductivity Poor Conductivity High Conductivity
Not malleable Not malleable Malleable
Not ductile Not ductile Ductile
High melting and boiling
point
Low melting and low
boiling point
High melting and boiling
point

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