1. Compound, element or mixture? How do you know?
Atoms
Compound, element or mixture? How do you know?

2. Homework
Due in: Wed 8th Nov TASK Complete the SMH quiz 3 times!

3. Learning Objectives
TWWL – about compounds, elements and mixtures – State some key ideas about atoms – Describe how atoms are different to each other – Explain how atoms are positioned in the periodic table

4. Is it a compound? 1 2 3 4

5. Is it a compound? 1 2 3 4

6. Is it an atom? 1 2 3 4

7. Is it an atom? 1 2 3 4

8. Is it an element? 1 2 3 4

9. Is it an element? 1 2 3 4

10. Is it a mixture? 1 2 3 4

11. Is it a mixture? 1 2 3 4

12. What is a molecule? 1 2 3 4

13. Key Terms EXT – Draw an example of each different type! Element
Two or more different types of atom which are not chemically joined together.
Mixture
A substance which is made up from only one type of atom.
Compound
Two or more atoms which are chemically joined together.
Atom
Tiny particles which are the building blocks of everything.
Molecule
Two or more different types of atom are chemically joined together.

14. Key Terms Element Mixture Compound Atom Molecule
Two or more different types of atom which are not chemically joined together.
Mixture
A substance which is made up from only one type of atom.
Compound
Two or more atoms which are chemically joined together.
Atom
Tiny particles which are the building blocks of everything.
Molecule
Two or more different types of atom are chemically joined together.

15. Key Terms Element Mixture Compound Atom Molecule
Two or more different types of atom which are not chemically joined together.
Mixture
A substance which is made up from only one type of atom.
Compound
Two or more atoms which are chemically joined together.
Atom
Tiny particles which are the building blocks of everything.
Molecule
Two or more different types of atom are chemically joined together.

16. Key Terms Element Mixture Compound Atom Molecule
Two or more different types of atom which are not chemically joined together.
Mixture
A substance which is made up from only one type of atom.
Compound
Two or more atoms which are chemically joined together.
Atom
Tiny particles which are the building blocks of everything.
Molecule
Two or more different types of atom are chemically joined together.

17. Key Terms Element Mixture Compound Atom Molecule
Two or more different types of atom which are not chemically joined together.
Mixture
A substance which is made up from only one type of atom.
Compound
Two or more atoms which are chemically joined together.
Atom
Tiny particles which are the building blocks of everything.
Molecule
Two or more different types of atom are chemically joined together.

18. Key Terms Element Mixture Compound Atom Molecule
Two or more different types of atom which are not chemically joined together.
Mixture
A substance which is made up from only one type of atom.
Compound
Two or more atoms which are chemically joined together.
Atom
Tiny particles which are the building blocks of everything.
Molecule
Two or more different types of atom are chemically joined together.

19. Chemical Formula
The chemical formula of a compound tells you how many atoms of each element the molecule contains.
CO2

20. Which one is the correct formula for water?
Chemical Formula
Which one is the correct formula for water?
H2O
h2o
H2o
H2O
HO2
h2O

21. Which one is the correct formula for water?
Chemical Formula
Which one is the correct formula for water?
H2O
h2o
H2o
H2O
HO2
h2O

22. Each element has a particular letter
Chemical Formula
CO2
Each element has a particular letter

23. Chemical Formula
??????
CO2
??????

24. Chemical Formula
oxygen
CO2
carbon

25. The little number tells us the number of one particular atom
Chemical Formula
The little number tells us the number of one particular atom
CO2

26. Chemical Formula
The little number tells us the number of one particular atom
CO2
In this case, there are 2 oxygen atoms

27. Chemical Formula
CO2
If an atom doesn’t have a little number next to it, it means there is only 1 of it.

28. Chemical Formula He
Some atoms have 2 letters instead of just one.

29. These atoms have a lower case letter as the second letter.
Chemical Formula He
These atoms have a lower case letter as the second letter.

30. What’s the difference between these two?
Chemical Formula CO Co
What’s the difference between these two?

31. Chemical Formula
carbon CO Co
oxygen
cobalt

32. HOW MANY ATOMS?
H2O

33. HOW MANY ATOMS?
H2O
H =
O =

34. HOW MANY ATOMS?
H2O
H = 2
O = 1

35. HOW MANY ATOMS?
SO3

36. HOW MANY ATOMS?
SO3
S =
O =

37. HOW MANY ATOMS?
SO3
S = 1
O = 3

38. HOW MANY ATOMS?
H2SO4

39. HOW MANY ATOMS?
H2SO4
H = 2
S = 1
O = 4

40. HOW MANY ATOMS?
NaHCO3

41. HOW MANY ATOMS?
NaHCO3
Na = 1
H = 1
C = 1
O = 3

42. HOW MANY ATOMS?
BaF2

43. HOW MANY ATOMS?
BaF2
Ba = 1
F = 2

44. EXT – Explain the difference between a compound and a molecule.
Substance
Is it an atom?
Is it a molecule?
Is it an element?
Is it a compound?
Carbon dioxide
(CO2)
Nitrogen
(N2)
Neon
(Ne)
Oxygen
(O2)

45. Atoms NO YES Substance Is it an atom? Is it a molecule?
Is it an element?
Is it a compound?
Carbon dioxide
(CO2) NO
YES
Nitrogen
(N2)
Neon
(Ne)
Oxygen
(O2)

46. Atoms NO YES Substance Is it an atom? Is it a molecule?
Is it an element?
Is it a compound?
Carbon dioxide
(CO2) NO
YES
Nitrogen
(N2)
Neon
(Ne)
Oxygen
(O2)

47. Atoms NO YES Substance Is it an atom? Is it a molecule?
Is it an element?
Is it a compound?
Carbon dioxide
(CO2) NO
YES
Nitrogen
(N2)
Neon
(Ne)
Oxygen
(O2)

48. Atoms NO YES Substance Is it an atom? Is it a molecule?
Is it an element?
Is it a compound?
Carbon dioxide
(CO2) NO
YES
Nitrogen
(N2)
Neon
(Ne)
Oxygen
(O2)

49. Chemical Formula O2

50. Chemical Formula O2 1

51. Chemical Formula O2 1 2

52. Chemical Formula
2O2
If we put a number in front of a molecule, it tells us how many of that molecule there are in total!

53. How many oxygen atoms are there now?
Chemical Formula
2O2
If we put a number in front of a molecule, it tells us how many of that molecule there are in total!
How many oxygen atoms are there now?

54. How many oxygen atoms are there now?
Chemical Formula
2O2
If we put a number in front of a molecule, it tells us how many of that molecule there are in total! 1
How many oxygen atoms are there now?

55. How many oxygen atoms are there now?
Chemical Formula
2O2
If we put a number in front of a molecule, it tells us how many of that molecule there are in total! 1 2
How many oxygen atoms are there now?

56. How many oxygen atoms are there now?
Chemical Formula
2O2
If we put a number in front of a molecule, it tells us how many of that molecule there are in total! 3 1 2
How many oxygen atoms are there now?

57. How many oxygen atoms are there now?
Chemical Formula
2O2
If we put a number in front of a molecule, it tells us how many of that molecule there are in total! 3 4 1 2
How many oxygen atoms are there now?

58. How many oxygen atoms are there now?
Chemical Formula
2O2
If we put a number in front of a molecule, it tells us how many of that molecule there are in total! 3 4 1 2
How many oxygen atoms are there now?

59. Chemical Formula
CO2

60. How many of each atom are there now?
Chemical Formula
2CO2
How many of each atom are there now?

61. Chemical Formula
2CO2
Carbon = 2
Oxygen = 4

62. HOW MANY ATOMS?
3H2O

63. HOW MANY ATOMS?
3H2O
H = 6
O = 3

64. HOW MANY ATOMS?
2SO3

65. HOW MANY ATOMS?
2SO3
S = 2
O = 6

66. HOW MANY ATOMS?
4H2SO4

67. HOW MANY ATOMS?
4H2SO4
H = 8
S = 4
O = 16

68. HOW MANY ATOMS?
3NaHCO3

69. HOW MANY ATOMS?
3NaHCO3
Na = 3
H = 3
C = 3
O = 9

70. HOW MANY ATOMS?
5BaF2

71. HOW MANY ATOMS?
5BaF2
Ba = 5
F = 10

72. How many atoms are there in each molecule?
EXT – Are there more oxygen atoms in a million molecules of water or half a million molecules of carbon dioxide (CO2)? Show your working.
How many atoms are there in each molecule?

73. EXT – Write the correct version of each false answer!
Atoms!
EXT – Write the correct version of each false answer!
Atoms are tiny particles.
Atoms can be seen with a magnifying glass.
Atoms make up everything around us.
Atoms can be split into smaller units.
Matter is the name given to all the objects and materials around us.
Atoms are all the same.
Indivisible means that something can be separated.
Extenision questions

74. Talk for 30 seconds!
End