1. MONDAY 10/20 What is an atom? What are the 3 parts of atoms?
Which part of an atom is positive?
Which part of an atom is negative?

2. Today’s Planner:
Atom Family

3. I can draw and label an atom.
Today’s Goal:
I can draw and label an atom.

4. Today’s Plan:
Atomic Structure
Periodic Table
PRACTICE

5. The Nature of Matter

6. The Nature of Matter How big is an atom compared to the Universe?
Video

7. ATOM
The smallest component of an element made of a nucleus of protons and neutrons with electrons circling this nucleus. 

8. Proton – A positively charged particle in the nucleus of an atom
Neutron – A non charged particle in the nucleus of an atom
Electron – A negatively charged particle that moves around the nucleus of an atom

9. A substance made of atoms that are all the same.
ELEMENT
A substance made of atoms that are all the same.
Examples: Helium, Hydrogen, Gold, Copper, Oxygen
NONEXAMPLES: Water (made of Hydrogen and Oxygen), Salt (made of Chlorine and Sodium), Sugar (made of Carbon, Oxygen, and Hydrogen)

10. Elements are represented by one- or two- letter symbols.
Pure substance, consists entirely of one type of atom.
Elements are represented by one- or two- letter symbols.

13. READING THE PERIODIC TABLE
Number of Protons 11 Na
22.99
Number of Electrons
Atomic Number
Symbol
Number of Protons + Neutrons
Atomic Mass

14. C 12.01 6 How many protons does carbon have?
How many electrons does carbon have? 6 C
12.01

15. Cl 35.45 17 How many protons does chlorine have?
How many electrons does chlorine have? 17 Cl
35.45

16. N 14.0 7 How many protons does nitrogen have?
How many electrons does nitrogen have? 7 N
14.0

17. F 19.0 9 How many protons does fluorine have?
How many electrons does fluorine have? 9 F
19.0

18. Cu 63.5 29 How many protons does copper have?
How many electrons does copper have? 29 Cu
63.5

19. P 31.0 15 How many protons does phosphorus have?
How many electrons does phosphorus have? 15 P
31.0

20. Drawing an Atom

21. Terms to know:
Atomic Number: the number at the top of each element’s box.
Represents the number of PROTONS that atom has.
It is also the number of ELECTRONS that atom has.

22. Practice What is the atomic number for Carbon?
What is the atomic number for Oxygen?
What is the atomic number for Nitrogen?
How many protons does Lithium have?
How many protons does Phosphorus have?

23. Electron Energy Levels
Electrons “orbit” and travel around the NUCLEUS (the protons and neutrons)
Electrons orbit in levels:
Level 1: Can hold 2 electrons
Level 2: Can hold 8 electrons
Level 3-ish: Can hold 8 electrons
The electrons in the outermost layer are called “VALENCE” electrons.