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? http://www.chrisjordan.com/

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

8. 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.

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

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

11. These small particles are called atoms

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

13. 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

14. An atom is the smallest unit of an element

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

16. Each element has unique physical characteristics and chemical behaviors

17. Hydrogen -Clear gas -Less dense than air -Flammable Helium - Clear gas - Less dense than air - Not flammable

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

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

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

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

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

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

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

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

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

27. 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 https://www.youtube.com/watch?v=p90Ug56GkcE https://www.youtube.com/watch?v=p90Ug56GkcE

28. Review 1.Everything on Earth is made of ________ (anything you can touch) - matter

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

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

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

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

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

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

35. Homework-Element Gossip Use the atomic number given to find the element. Write the element symbol on the blanks (1 st letter of the symbol is capitalized, 2 nd (if present) is lower case. Then write the full name of each element. Periodic tables can be found in your agenda book page 119.

36. https://www.youtube.com/watch?v=_lNF3_30l UE