1. Bell Work
You are required to know first 20 elements of periodic table (#, name, symbol)
Your task is to come up with a mnemonic technique to remember them
For example ...
Huggy Helen Likes Bernie Borrowing Cassies New Oven From Neil.
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon.

2. Chemistry
Chemical Families

3. What are Chemical Families?
A group (column) of elements with similar properties of the periodic table.
In Grade 9, we will look at four families.

4. Alkali Metals
Group #: 1
Elements Present: Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), Francium (Fr)
Physical Properties: Shiny, silvery, soft, low density, solid.
Chemical Properties: highly reactive, most reactive metals

5. Alkaline Earth Metals Group #: 2
Elements Present: Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), Radium (Ra)
Physical Properties: Shiny, silvery, harder than group #1, more dense than group #1, solid.
Chemical Properties: fairly reactive, burn with colourful flames.

6. Halogens Group #: 17 (Grade 9 >> Group 7)
Elements Present: Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), Astantine (At)
Physical Properties: Varying states at room temperatures.
Chemical Properties: Highly reactive, most reactive non-metals.
Fluorine most reactive >> Astantine least reactive
Opposite to metals.

7. Noble Gases (Inert Gases)
Group #: 18
Elements Present: Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn)
Physical Properties: Gases at room temperature, colourless, odourless, tasteless.
Chemical Properties: Unreactive (very stable), glow bright colours when current is passed through them.

8. To Do …
P225 #1-3,6,8