physical science 1st qaurter

1. Welcome to
Physical
Science

2. Who wants
to be a
millionaire?

3. What is nuclear fusion?

4. How do light elements
are formed?

5. How do heavier elements
are formed?

6. Give at least two light
elements

7. If you fuse two carbon
atoms, what element will
form?

8. OBJECTIVES
1. Identify the polarity of the
molecule;
2. Compare and contrast polar and
non-polar molecule;
3. Appreciate the importance of
different molecules in relation to its
polarity and its application to daily
life.

9. GUESS THE GIBBERISH

10. LAW OWN PAY AIR
LONE PAIR

11. MALT LAY QUILL
MOLECULE

12. EEL LEAK TRUE
NEED GOT
THIEVES BEAT TEA
ELECTRONEGATIVITY

13. FOE LARD BOON AND
POLAR BOND

14. NOON FOE LARD
BOON AND
NON POLAR BOND

15. MALL LET CURE LIAR
JAW MEET THREE
MOLECULAR
GEOMETRY

16. SOUL YOUTH BOWL
SOLUBLE

17. ARE YOU FAMILIAR
WITH THOSE WORDS?
WHAT DO YOU THINK
IS OUR LESSON THIS
MORNING?

18. POLARITY OF
MOLECULES AND
ITS PROPERTIES

19. WHAT IS MOLECULE?
A group of two or more
atoms held together by
chemical bonds.

20. WHAT ARE THE EXAMPLE OF
MOLECULE?

21. POLARITY
- refers to the distribution of
electric charge around atoms,
chemical groups, or molecules

22. Electronegativity (EN)
- Is the measure of relative tendency
of an atom to attract electrons to
itself when chemically combined
with another atom.

23. POLAR BOND
-unequal sharing of electron
-Either containing lone pairs of
electron on a central atom or
having different electronegativity

24. POLAR BOND
H2O

25. NON-POLAR BOND
-equal sharing of electron
-asymmetric with no unshared
electrons

26. NON-POLAR BOND
Br2

27. MOLECULAR GEOMETRY
-equal sharing of electron
-asymmetric with no unshared
electrons

28. POLARITY EXPERIMENT

30. 1. Which of the following substance are
miscible with water?
2. Why other substances do mix while
other don’t?

31. Solubility – refers to the ability of a
substance (solute) to dissolve in another
substance (solvent).
Miscibility – refers to the ability of two
substances, usually liquids, to mix in all
proportions.

32. TYPES OF POLARITY
NON POLAR BOND
- If the difference in EN is 0.0 to 0.4
Ex: Br2
2.8 – 2.8 = 0
CH
2.5 – 2.1 = 0.4

33. TYPES OF POLARITY
POLAR BOND
- If the difference in EN is 0.5 to 1.7
Ex: H2O
4.2 – 3.5 = 0.5
MgCl
3.0 – 1.2 = 0.8

34. TYPES OF POLARITY
IONIC BOND
- If the difference in EN is 1.8 to 3.3
Ex: NaCl
3.0-0.9 = 2.1

35. BOARD ACTIVITY

36. Mechanics:
1. Each member of the group should participate.
2. Each participant, are given a max. of 35 seconds
to
answer the problem.
3. The participant to answer within 25 seconds is
given 5 points, 3 points for within 30 seconds, 1
point for within 35 seconds, 0 point if time is up.
4. A group with greater points will be declared as
winner.

37. C and N

39. Fe and S

41. C and C

43. H and Cl

45. Si and P

47. Cu and Ni

49. Cu and Ni

51. Mg and Cl

53. How to know that a certain
compound is Polar?
How to know that a compound
is non polar?

54. Oil grease on dish

55. Why does adding a little dish detergent
help remove the grease from dirty dishes
better than water alone?

56. How can we identify polar molecules
from non-polar molecules?
How electronegativity affects the
polarity of the molecules?

57. Short Quiz

58. 1. What is the polarity of H2?
a. Ionic
b. Polar
c. Non-polar
d. None of these

59. 2. Carbon and Chlorine has an electronegativity
difference of 0.5, therefore their type of polarity is
___.
a. Ionic
b. Polar
c. Non-polar
d. None of these

60. 3. Which of the following best differentiate Polar and non-
polar molecules?
a. Polar molecules have an electronegativity difference of 0.5
-1.7, while non-polar molecules are less than 0.5.
b. Polar molecules have an electronegativity difference of
greater than 1.7, while non-polar molecules are equal to 1.7.
c. Polar molecules have an equal sharing of electrons while
the non-polar has an unequal sharing of electron.
d. Polar molecules and non-polar have the same properties.

61. 4. Which of the following is TRUE about polar
bond?
a. Polar molecules are asymmetrical
b. Polar molecules contain lone pairs of electron
c. Polar molecules have atoms with different
electronegativity bonded
d. All of these

62. 5. Which of the following is the practical
application of polarity in our daily life?
a. Removing of grease in dishes by using
detergent.
b. Used in signaling of electronic devices
c. Dissolve other polar substances easily
d. All of these

63. 1. List common molecules/compound you found
at home.
2. Find its polarity

64. Good Job everyone!
Keep learning