1. Alkali Metals Group 1 Metals Or Li Na K Rb Cs Fr Squeaky pop!!
Mr R. Tucker (PP02_2005)

2. Which Group? Q ….Where are they in the Periodic Table??
A… Group 1
Mr R. Tucker (PP02_2005)

3. Are Alkali Metals Hard ? Sodium Lithium Pottasium
Alkali Metals are SOFT when cut, producing a shinny surface, which QUICKLY tarnishes in air.
Pottasium

4. Properties of Alkali Metals
All alkali (group 1) metals react violently with water, forming Hydrogen gas and Hydroxides (pH above 7):
ie., Lithium + Water  Hydrogen + Lithium Hydroxide
Alkali metals are:
Metals found in group 1 of the periodic table
Soft when cut (compared to other metals)
Metals with low melting points and densities
Metals which tarnish in air (form white oxides with oxygen)
Question: Why are alkali metals stored under oil?
A.. They react with water in the air

5. Similar Reactions of alkali metals with water
Changes
Activity
Lithium
Floats, fizzes, releases hydrogen, moves about, alkali formed
Third place
3rd
Sodium
As before, but metal melts to a bead
Second place
2nd
Potassium
As sodium, but hydrogen gas burns with a lilac flame, can explode on water surface
First place
1st
Mr R. Tucker (PP02_2005)

6. Increasing atomic number
Alkali Metals
In order of increasing atomic number the alkali metals are:
Lithium
Sodium
Potassium
Rubidium
Caesium
Francium
Increasing atomic number
Mr R. Tucker (PP02_2005)

7. Alkali Metals - increasing reactivity down a metal groups
In order of increasing atomic number the alkali metals are:
Lithium
Sodium
Potassium
Rubidium
Caesium
Francium
Increasing atomic size
Outermost shell electrons are farther away from nucleus
More easily lost
Mr R. Tucker (PP02_2005)

8. Flame colours of alkali metal compounds
Flame colour seen
Lithium compounds
Red
Sodium compounds
Bright yellow
Potassium compounds
Lilac
Mr R. Tucker (PP02_2005)

9. Reactivity These elements are highly reactive metals.
The reactivity increases on descending / going down the Group from lithium to caesium.

10. Videos on youtube
Cutting Alkali metals and their reactions with in water
Violent Reaction (Explosion) of Alkali Metals with Water

11. What if the Most reactive metal element reacts with the Most reactive non-metal element in the periodic table?

12. What if the Most reactive metal element reacts with the Most reactive non-metal element in the periodic table?

13. What if the Most reactive metal element reacts with the Most reactive non-metal element in the periodic table?
What is the Most reactive metal in the periodic table?
It should be Francium, but Fr is radioactive and is extremely difficult to be used in laboratory experiment (half-life is 22 min). Instead Caesium is used here
What is the Most reactive non-metal in the periodic table?
Fluorine

14. Reacting Fluorine with Caesium - First Time on Camera