1. The Periodic Table of Elements

2. The Periodic Table is Divided into Sections by Jagged Red Line!
Metals
Nonmetals
Metalloids
Metals – left of red line
Nonmetals – right of red line
Metalloids – touch TWO SIDES of red line
Notice there are Exceptions:
Hydrogen
Aluminum
Polonium

3. Color-code your periodic table!
Metals Nonmetals Metalloids

4. Time for a Lab!! The Element Survey

5. Properties of… Which is…. Shiny or Dull? Bendable or Brittle?
Solids or Powders/Liquids?
Good or Poor Conductors?
Metals
Nonmetals
Shiny (when polished)
Dull
Bendable
Brittle
Solids
Powders, Liquids, Gases
Good Conductors
Poor Conductors

6. The Periodic Table has rows and columns!
The rows are called PERIODS.
The columns are called GROUPS or FAMILIES.
Family
Period

7. Periods and Families are Numbered!
1 2
Renumber your Families…
*Instructions in class!
What element is found in Group2, Period 3?
Magnesium 1 2 3

8. Groups/Families are Given Names
Boron Family
Group 4
Carbon Family
Group 5
Nitrogen Family
Group 6
Chalcogens
Group 7
Halogens
Group 8
Noble Gases
Group 1
Alkali Metals
Group 2
Alkaline Earth Metals
Groups between 2 & 3
Transition Metals

9. Elements are grouped in FAMILIES because they are RELATED!
DEMO –
Sodium
Lithium
Both react with water!
TIME FOR A LAB!

10. The Periodic Table Lists ELEMENTS!!
Each element has a square with information in it.
Name
Symbol
Atomic NUMBER (number in upper right-hand corner)
Atomic MASS (bottom)

11. Elements are IN ORDER by Atomic Number!
Two rows at bottom
Lanthanide Series
Actinide Series
They’re pulled out so the table isn’t so wide.
Why is the atomic number so great?

12. The Atomic NUMBER tells you the NUMBER OF PROTONS!
NUMBER OF PROTONS = NUMBER OF ELECTRONS
How many protons are in an atom of Silver? 47
How many electrons?

13. So What Does the Atomic MASS tell you?
The Atomic MASS is the MASS of the atom!
What is the HEAVIEST part of the atom?
Protons & Neutrons
(Electrons are nearly weightless)
So, the MASS is the SUM of protons and neutrons.
Atomic Mass
What is the Atomic MASS of an atom of Silver?
108 (round up)
How many NEUTRONS are in one atom of Silver??
Mass – Protons = Neutrons
108 – 47 = 61

14. Let’s Practice A Few…
How many protons, electrons, and neutrons are in ONE atom of Helium?
Protons 2
Electrons
Neutrons
2 (4 – 2 = 2)

15. What about for an atom of…
Platinum?
Protons 78
Electrons
Neutrons
117 (195 – 78 = 117)

16. How about…
Uranium?
Protons 92
Electrons
Neutrons
146 (238 – 92 = 146)

17. Can You Do a Tricky One?
You found a sample of an element! With some careful testing, you determine there are 18 protons in each atom of the sample. What element did you find?
Argon!
So, the number of protons (& electrons) DEFINES an element.

18. Review Why is the Periodic Table shaped so funny?
In order by increasing Atomic Number
Families
Metals/Nonmetals/Metalloids
Bottom 2 rows pulled out
Space below Hydrogen
Calculate protons, neutrons, & electrons for Lithium.