2. Texting101
What words/phrases to the abbreviations in the text conversation represent?
What are some other of abbreviations you use?
Why do you think people use abbreviations?
Are there any disadvantages of using abbreviations?

3. THE mighty Periodic Table
Arranges all the elements in order of the size of their atoms by a symbol
Groups together elements with similar properties

4. THE mighty Periodic Table
Group
Metalloids
Non-metals
->
->
Metals
->
Period

5. How do you read the table?

6. How do you read the table?
Helium has
TWO protons
and
TWO electrons
The atomic number shows the number of protons in an element.
In any element, number of electrons = number of protons.

7. An ATOM
A particle that cannot be divided further and consists of protons, neutrons and electrons
An element
Every unique element on the periodic table has its own atomic number, which means it has a different number of protons and electrons. For example, the helium atom contains 2 protons, 2 electrons and 2 neutrons.

8. What about the Carbon atom?
What is the difference between these two elements??
Hydrogen atom
Helium atom
Atomic Number 1 2
Number of electrons
Number of protons
Hydrogen atom
Helium atom
Atomic Number
Number of electrons
Number of protons
What about the Carbon atom?