1. The elements

2. LEARNING GOALS
We are learning to identify and classify elements on the periodic table.
We are learning to identify elements by their names or symbols.

3. Elements and their symbols
90 naturally occur on earth
25 new ones made by chemists
divided into metals, non-metals and metalloids based on properties

4. metals majority of elements
most are shiny and silver or grey in colour
excellent conductors of electricity and heat
malleable and ductile
Ag, Na, Pd, Hg

5. Non-metals only 17 elements
grouped together mainly because don’t resemble metals.
11 of the non-metals are gases at room temperature
5 are solids
1, bromine, is a red-brown liquid

6. metalloids metallic and non-metallic properties.
don’t conduct electricity very well – semiconductors.
easier to control the flow of electricity through semiconductors
electronic devices
Silicon most common

7. Element symbols consists of one or two letters.
first letter is always capitalized.
if there is a second letter, it is not capitalized.
Co vs CO

8. LEARNING GOALS
We are learning to identify and classify elements on the periodic table.
We are learning to identify elements by their names or symbols.

9. Please complete
Textbook 6.1 #1, 3, 4, 5, 8.