1. WHAT IS AN ELEMENT?
Introduction to Atoms

2. ATOM Overview
http://www.fotosearch.com/photos-images/atom.html

3. ATOM Overview
Review: What are the 3
kinds of matter?
http://www.fotosearch.com/photos-images/atom.html

4. ATOM Overview
Review: What are the 3
kinds of matter?
Atoms = Small pieces
that make up matter http://www.fotosearch.com/photos-images/atom.html

5. ATOM Overview
Review: What are the 3
kinds of matter?
Atoms = Small pieces
that make up matter http://www.fotosearch.com/photos-images/atom.html
Have two parts

6. ATOM Overview
Review: What are the 3
kinds of matter?
Atoms = Small pieces
that make up matter http://www.fotosearch.com/photos-images/atom.html
Have two parts
The nucleus

7. ATOM Overview
Review: What are the 3
kinds of matter?
Atoms = Small pieces
that make up matter http://www.fotosearch.com/photos-images/atom.html
Have two parts
The nucleus
The electron cloud

8. Parts of an Atom
http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookCHEM1.html

9. Parts of an Atom
Nucleus:
http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookCHEM1.html

10. Parts of an Atom
Nucleus:
http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookCHEM1.html

11. Parts of an Atom
Nucleus:
A center with a
positive charge
http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookCHEM1.html

12. Parts of an Atom
Nucleus:
A center with a
positive charge +
http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookCHEM1.html

13. Parts of an Atom
Electron Cloud:
Nucleus:
A center with a
positive charge +
http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookCHEM1.html

14. Parts of an Atom
Electron Cloud:
Nucleus:
A center with a
positive charge +
http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookCHEM1.html

15. Parts of an Atom
Electron Cloud:
Nucleus: Cloud of
Electrons that
A center with a have a negative
positive charge + charge
http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookCHEM1.html

16. Parts of an Atom
Electron Cloud:
Nucleus: Cloud of
- Electrons that
A center with a have a negative
positive charge + charge
http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookCHEM1.html

17. Confused about Charge?
•Atoms are like batteries they have
zero total charge.
•Think about charges on an atom
like charges on a battery!
On one end there is a positive (+)
charge on the other a negative (-)
charge, but the whole battery has www.diytrade.com/china/4/products/2196408/Pan...
zero charge because they balance
out.

18. A Closer Look at the Nucleus
•2 particles
http://www.fotosearch.com/photos-images/atom.html

19. A Closer Look at the Nucleus
•2 particles
Proton (p+): a positive
particle; weight 1
http://www.fotosearch.com/photos-images/atom.html

20. A Closer Look at the Nucleus
•2 particles
Proton (p+): a positive
particle; weight 1
http://www.fotosearch.com/photos-images/atom.html

21. A Closer Look at the Nucleus
•2 particles
Proton (p+): a positive
particle; weight 1
http://www.fotosearch.com/photos-images/atom.html
•Neutron (n): a neutral
particle, weight 1

22. A Closer Look at the Nucleus
•2 particles
Proton (p+): a positive
particle; weight 1
http://www.fotosearch.com/photos-images/atom.html
•Neutron (n): a neutral
particle, weight 1

23. What is in the Electron Cloud?

24. What is in the Electron Cloud?
•Electron (e-): a
negative particle;
weight ~ 0

25. What is in the Electron Cloud?
•Electron (e-): a
negative particle;
weight ~ 0
• Electrons zoom
around the nucleus
in circles

26. What is in the Electron Cloud?
•Electron (e-): a
negative particle;
weight ~ 0
• Electrons zoom
around the nucleus
in circles

27. Reflection
After your notes do a 3-2-1:
List the 3 particles in an atom
List the 2 parts of an atom
Define an atom

28. Atomic Particles Review Chart
Particle Charge Mass/Weight
Proton +1 1u
Neutron 0 1u
Electron -1 0u

29. Atomic Particles Review Chart
Particle Charge Mass/Weight
Proton +1 1u
Neutron 0 1u
Electron -1 0u
What two particles make up the nucleus?

30. Atomic Weight and Charge Practice Problems

31. Atomic Weight and Charge Practice Problems
•What is the charge of an atom that has 2 protons
and 2 neutrons?

32. Atomic Weight and Charge Practice Problems
•What is the charge of an atom that has 2 protons
and 2 neutrons?
• What is the weight of an atom with 5 protons, 5
neutrons, and 5 electrons?

33. Atomic Weight and Charge Practice Problems
•What is the charge of an atom that has 2 protons
and 2 neutrons?
• What is the weight of an atom with 5 protons, 5
neutrons, and 5 electrons?
•What is the charge of an atom with 9 protons, 9
neutrons, and 9 electrons?

34. Atomic Weight and Charge Practice Problems
•What is the charge of an atom that has 2 protons
and 2 neutrons? +2
• What is the weight of an atom with 5 protons, 5
neutrons, and 5 electrons?
•What is the charge of an atom with 9 protons, 9
neutrons, and 9 electrons?

35. Atomic Weight and Charge Practice Problems
•What is the charge of an atom that has 2 protons
and 2 neutrons? +2
• What is the weight of an atom with 5 protons, 5
neutrons, and 5 electrons? 10
•What is the charge of an atom with 9 protons, 9
neutrons, and 9 electrons?

36. Atomic Weight and Charge Practice Problems
•What is the charge of an atom that has 2 protons
and 2 neutrons? +2
• What is the weight of an atom with 5 protons, 5
neutrons, and 5 electrons? 10
•What is the charge of an atom with 9 protons, 9
neutrons, and 9 electrons? 0

37. Ways of drawing atoms
Even though
drawings are
different
represent same
things!!

38. Ways of drawing atoms
Even though
drawings are
different
represent same
things!!

39. Ways of drawing atoms
Even though
drawings are
different
represent same
things!!

40. Ways of drawing atoms
Even though
drawings are
different
represent same
things!!

41. Ways of drawing atoms
Even though
drawings are
different
represent same
things!!

42. Ways of drawing atoms
Even though
drawings are
different
represent same
things!!
Nucleus

43. Ways of drawing atoms
Even though
drawings are
different
represent same
things!!
Nucleus
Electrons

44. Ways of drawing atoms
Even though
drawings are
different
represent same
things!!
Nucleus
Electrons

45. Ways of drawing atoms
Even though
drawings are
different
represent same
things!!
Nucleus
Electrons

46. Ways of drawing atoms
Even though
drawings are
different
represent same
things!!
Nucleus
Electrons

47. Ways of drawing atoms
Even though
drawings are
different
represent same
things!!
Nucleus
Electrons

48. Ways of drawing atoms
Even though
drawings are
different
represent same
things!!
Nucleus
Electrons
Orbitals

49. A Closer Look at the Electron Cloud
*Fill orbitals from inside to out
*Orbital 3 also holds 8

50. A Closer Look at the Electron Cloud
*Fill orbitals from inside to out
*Orbital 3 also holds 8

51. A Closer Look at the Electron Cloud
•Electrons travel in orbitals
*Fill orbitals from inside to out
*Orbital 3 also holds 8

52. A Closer Look at the Electron Cloud
•Electrons travel in orbitals
•Orbitals (circles around nucleus) can carry different
amount of electrons
*Fill orbitals from inside to out
*Orbital 3 also holds 8

53. A Closer Look at the Electron Cloud
•Electrons travel in orbitals
•Orbitals (circles around nucleus) can carry different
amount of electrons
Orbital 1:
Can carry up to
2 electrons
*Fill orbitals from inside to out
*Orbital 3 also holds 8

54. A Closer Look at the Electron Cloud
•Electrons travel in orbitals
•Orbitals (circles around nucleus) can carry different
amount of electrons
Orbital 1:
Can carry up to
2 electrons
*Fill orbitals from inside to out
*Orbital 3 also holds 8

55. A Closer Look at the Electron Cloud
•Electrons travel in orbitals
•Orbitals (circles around nucleus) can carry different
amount of electrons
Orbital 1:
Can carry up to
2 electrons
*Fill orbitals from inside to out
*Orbital 3 also holds 8

56. A Closer Look at the Electron Cloud
•Electrons travel in orbitals
•Orbitals (circles around nucleus) can carry different
amount of electrons
Orbital 1: Orbital 2:
Can carry up to can carry up
2 electrons to 8 electrons
*Fill orbitals from inside to out
*Orbital 3 also holds 8

57. A Closer Look at the Electron Cloud
•Electrons travel in orbitals
•Orbitals (circles around nucleus) can carry different
amount of electrons
Orbital 1: Orbital 2:
Can carry up to can carry up
2 electrons to 8 electrons
*Fill orbitals from inside to out
*Orbital 3 also holds 8

58. A Closer Look at the Electron Cloud
•Electrons travel in orbitals
•Orbitals (circles around nucleus) can carry different
amount of electrons
Orbital 1: Orbital 2:
Can carry up to can carry up
2 electrons to 8 electrons
*Fill orbitals from inside to out
*Orbital 3 also holds 8

59. What is an element?
Atoms come in different types (because the
number of protons, neutrons, and electrons
change)
element- a substance that cannot be
broken down chemically and all atoms in it
are the same
Examples : Copper, Oxygen, Hydrogen

60. Atomic Orbital Practice Problems

61. Atomic Orbital Practice Problems
•Draw how 6 electrons would go in the orbitals?

62. Atomic Orbital Practice Problems
•Draw how 6 electrons would go in the orbitals?
•Draw how 4 electrons would go in the orbitals?