1. The
Periodic
Table

2. Get out your periodic Tables!

4. Organization of the Elements

5. Who discovered the electron? JJ Thomson
History of the atom
Who discovered the electron?
JJ Thomson

6. What part of the atom did Ernest Rutherford discover? The Nucleus
History of the atom
What part of the atom did Ernest Rutherford discover?
The Nucleus

7. Who Discovered The Periodic Table?? (1869, Russian Chemist)
Organized elements by increasing mass.
Elements with similar
properties were grouped
together.

8. Dmitri Mendeleev (1869, Russian)
Predicted properties of undiscovered elements.

9. Identify the three classifications of elements by their colors

10. Periods and Groups Periods are also known as ______________
Groups are also known as ______________

11. Au Si Br Classify the following as either a
METAL, NON-METAL or METALLOID: Au Si Br

12. METALS : 4 properties of metals
Did you know? - a sugar cube sized chunk of gold can be pounded into a thin sheet which will cover a football field!

13. NON- METALS :
4 properties of non-metals

14. Metalloids continued...
Properties:
Another word that refers to for properties of metalloids is between metal and non-metal is??

15. Classify the following as either a: METAL, NON-METAL or METALLOID: H B Pb
An element that is brittle and conducts electricity
An element that is malleable
An element that has tendency to become an anion

16. What group is?? Elements in Group 18 of the periodic table.
They are considered non metals.
These elements are generally unreactive.
All are gases at room temperature.
Examples: neon, argon, krypton, xenon, and helium.

18. Atomic Number
# of
Mass Number

19. What is the:
Element?
atomic number?
mass?
number of neutrons?

20. What is the:
Element? potassium
atomic number? 19
mass? 39
number of neutrons? 20

21. 43 185 195 As 3- W 6+ Au Element Atomic Number Atomic Mass
# of Protons
# of Electron
# of Neutrons
As 3- 43
W 6+
185 Au
195

22. Element
Atomic Number
Mass #
# of Protons
# of Electron
# of Neutrons
As 3- 33 76 36 43
W 6+ 74
185 68
111 Au 79
195
116

23. QUESTION: These carbon atoms are known as different ___________?

24. a) Which element is this? _____________
b) What is the mass number? _____________
c) What is the atomic number? _____________
d) Number of protons? _____________
e) Number of neutrons? _____________
f) If the mass was 37, how many neutrons would Cl have?

25. a) Which element is this? _____chlorine________
b) What is the mass number? ____35_________
c) What is the atomic number? ____17_________
d) Number of protons? _______17______
e) Number of neutrons? ______18_______
f) If the mass was 37, how many neutrons would Cl have? 20

26. Isotopes
Atoms that contain the same number of ____________ but have different numbers of _____________
That means each isotope has a different ______________
Symbols
11Na23 or 11Na & 6C12 or 6C13 or 6C14