1. Chapter 4 Periodic Table
4.1 Quiz = 15 October
Chapter 4 Test = 23 October

2. Vocabulary Atom Electron Nucleus Proton Neutron Atomic number Isotope
Mass number
Atomic mass
Periodic table
Period
Group
Chemical symbol
Metal
Nonmetal
Inert gas
Semimetal
Radioactivity

3. Practice: Due 23 October
Atomic Theory Timeline (4.1) Create a time line that illustrates and describes the development of the atomic theory. If you would like to do this online, try using Meograph
Elemental Superhero (4.2) Pick one of the elements. Research its properties. Invent a superhero with the properties of the element you chose. Draw and describe your superhero. Be sure to explain how the properties of the element relate to the skills and weakness of your hero. Fun format idea = create a "facebook" page for your superhero.
Metal Families (4.3) Design a graphic organizer that shows similarities and difference between the metal families.
Nonmetal Families (4.4) Design a graphic organizer that shows similarities and difference between the nonmetal families.
Radioactive News Article (4.5) Find a news article about an event related to radioactivity. This can be a current article or one from the past. Write a summary. Include a link to the original article and an illustration.

4. Matter
All the ‘stuff’ of the universe is composed of Matter. Ex: air, you, your table, a pencil, a star, etc…
Matter – anything that has mass, and takes up space.
The smallest particle of matter is an atom.
The structure of the atom determines the traits of matter.

5. Atoms
An atom consists of 3 main parts: protons, neutrons, and electrons.
Protons and neutrons are in the nucleus (the center of the atom), while electrons orbit the nucleus. (like planets around our sun)
Protons have a positive charge (+), neutrons are neutral (0), while electrons have a negative charge (-).

6. Important parts of the atom:
Structure of an Atom
Important parts of the atom:
Subatomic Particle
Symbol
Charge
Mass
Location
Proton p Positive 1 amu Nucleus
Neutron N Neutral 1 amu Nucleus
Electron e Negative 0 amu Electron
Cloud

7. The Periodic Table All matter in the universe is made up of elements.
The periodic table organizes the elements by atomic # (the # of protons in the nucleus).

8. Structure of an Atom Atomic Number Chemical Symbol Chemical Name
Atomic # = # of protons in the nucleus (this is what defines the element)
Atomic Mass = sum of protons + neutrons in nucleus
In an atom, the number of protons (+) are equal to the number of electrons (-) – so the charges balance out and the atom has a neutral overall charge
Atomic Number
Chemical Symbol
Chemical Name
Atomic Mass

9. Reading the Element Square
To find the number of protons: it’s the same as the atomic number
To find the number of electrons: it’s the same as the atomic number
To find the number of neutrons:
Atomic Mass
- Atomic number___
# of neutrons

10. Organizing the Elements
Group or Family – elements in the same column (up or down), numbered from 1-18 1 2 3 4 5 6 7
Period – a horizontal row (across) the periodic table, numbers from 1-7

11. Families
Families or groups are in vertical columns (18) and elements in a family have similar traits or properties.
Elements in a family can make the same number of bonds and so have similar chemical properties

12. Periods
Periods are the horizontal rows are elements in a period DO NOT have similar properties.
Elements in a period have the same # of electron shells.

13. Periodic Table
Elements are also classified as metals, nonmetals or metalloids according to their properties
The zig zag line on the table separates these categories
To the left: metals To the right: non-metals
Touching the zig zag line= metalloids

14. Properties of Metals
Metals have similar physical properties. They are:
Shiny
Malleable – can bend or pound into shapes
Ductile – can form into wires
Good conductors of heat and electricity
High melting points
Hard
Chemical properties can vary. Some can corrode, and some are very reactive –
form bonds.

15. Properties of Non-metals
Non-metals have the opposite properties of metals. They are:
Dull
Brittle
Non-conductive (Insulators)
Low melting points
Mostly gases at room temperature
Chemical properties:
All non-metals can form compounds except the noble gases (family 18).
Noble gases (inert gases) – the last family on the periodic table that does not react with anything. They are the snobs of the table. Ex: helium, neon

16. Properties of Semi-metals
The semi-metals (also called metalloids) can have properties of both metals and nonmetals.
Their most useful property is that they are semi-conductors.
Semi-conductor – the varying ability to conduct electricity. Used in every computer chip in the world.
Example: silicon