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C6: Groups in the Periodic Table (Alkali metals (What happens when it…
C6: Groups in the Periodic Table
Alkali metals
Located in Group 1 of the periodic table
2 physical properties
Soft
Relatively low heating points
What happens when it reacts with water
It floats in the water
Starts bubbling and releases gas
Heat is released
Reactivity increases as you go down group 1
The atoms of the group 1 element lose an electron to become a 1+ positive ion.
Describe these elements at room temperature
Chlorine
Becomes a Pale green gas
Bromine
Becomes a Red-brown liquid
Iodine
Becomes a Grey solid
Noble gases
Located in the Group 0 of the periodic table
3 Properties
They're inert
They have full outer shells
Low flamililty
Low density
What happens as you go down group 0
Boiling point increases
Halogens
Located in Group 7 of the periodic table
What happens as you go down group 7
Boiling point increases
What is formed when it reacts with...
Hydrogen
Hydrogen halide
In water they dissolve to produce acidic solutions
Metal
Metal halide
The atoms of halogens gain an electron to become a 1- ion