1. Introduction to Atoms

2. What is matter? Matter is anything you can touch. Includes Solids
Liquids
Gases
Yes, you can touch a gas, you can feel the air molecules hitting your face when a fan is on.

3. Matter is made of smaller particles

4. How was this painted?

5. Small particles combine to make the larger object

6. How was this made? www.chrisjordan.com

7. What do these pieces of art have to do with matter?

8. Like the art, matter is made of small particles

9. It's also like a picture stored in a computer...
From a distance, it looks continuous, but if you blow it up,
You can see the individual pixels that it is made from.

10. Legos It's also like building things out of Legos...
You can take small, individual pieces and put them together to make something bigger.

11. These small particles are called atoms

12. Atoms are tiny https://www.youtube.com/watch?v=yQP4UJhNn0I

14. Atom Atoms are the building blocks of all materials
An atom is made of 3 parts:
Protons and Neutrons are in the nucleus (center)
Electrons orbit around the nucleus

15. How do we know about atoms?
Ted History of Atoms (5:30mins)
Crash Course Chemistry #37 (9 min)

16. An atom is the smallest unit of an element

17. There are 118 known elements
An element is a substance that cannot be broken down into simpler substances.

18. Each element has unique physical characteristics and chemical behaviors

19. Each element has unique physical characteristics and chemical behaviors
Hydrogen
Clear gas
Less dense than air
Flammable
Helium - Clear gas - Less dense than air - Not flammable

20. An atom is the smallest unit of an element that has all the physical characteristics and chemical behaviors of that element.

21. So how do I know what element I have?

22. The number of protons in an atom’s nucleus tells us what element it is.

23. No two elements have the same number of protons.

24. So how do I know how many protons are in an element?

25. Reading the Periodic Table
The atomic number tells us how many protons are in the nucleus.

26. How many protons are in aluminum?
Nitrogen?
Sulfur?
Carbon? 13 7 16 6

27. The periodic table is arranged by atomic number- smallest to largest

28. The element block will also include a symbol for the element
The symbol is a short hand way of writing the element’s name

29. Some elements have a single letter for their symbol
The first letter is ALWAYS capitalized
If there is a second letter, it is ALWAYS lower case
Element symbols and some unusual names

30. Review
Everything on Earth is made of ________ (anything you can touch)
- matter

31. Review
2. Matter is made of small particles called ____ -Atoms

32. Review
3. Atoms are made of three smaller particles called _____ -protons, neutron, and electrons

33. Review
4. An atom is the smallest unit of an ________ -Element

34. Review
5. Each element is different, physically and chemically, because each element has a different number of ______ in its nucleus - protons

35. Review
6. The _______ _________ tells us how many protons are in the nucleus. -Atomic number

36. Review
7. The element can be represented by a symbol. The first letter is always ______ and the second letter is always _______ ________ -capitalized -lower case

37. Homework-Element Gossip
Use the atomic number given to find the element.
Write the element symbol on the blanks (1st letter of the symbol is capitalized, 2nd (if present) is lower case.
Then write the full name of each element.
Periodic tables can be found in your agenda book or in the textbook inside covers.

38. Reading an Element Box Atomic Number
Number of protons in the nucleus of the atom
Element Name
Usually from a Greek or Latin word for the element or a substance containing the element
# of Protons =
# of Electrons
Symbol
Shorthand way of representing the element
Atomic Mass
Number of protons and neutrons in the nucleus of the atom
Protons + Neutrons = Mass

39. Practice What is the symbol? C What is the element? Carbon
What is the atomic number? 6
What does atomic number tell us?
Number of protons in nucleus
Protons = electrons
What is the atomic mass?
12 (round to nearest whole number)
What does the atomic mass tell us?
Protons + neutrons in the nucleus

40. On the back Draw an atom of Lithium
How many protons, neutrons, and elections?
Where do they go?
3 protons
4 neutrons
3 electrons

41. On the back Draw an atom of Oxygen
How many protons, neutrons, and elections?
Where do they go?
8 protons
8 neutrons
8 electrons

42. On the back Draw an atom of Iron
How many protons, neutrons, and elections?
Where do they go?
26 protons
30 neutrons
26 electrons

43. Homework

44. On