Revision of tunit 4. Material properties

04.27.2020
08:45:18
Dear students,
good morning everyone
Today's revision topic : material properties
Pg.no : 60 to 67
In Ur cambridge check point science grade 9 book
Try to revise the concepts like
1.structure of atom
2.rutherford - gold foil experiment
3. Group 1 elements examples : lithium, sodium and potassium
4.Group 7 elements : halogens
Example. : Fluorine, chlorine , bromine
5 . Group 8 elements - noble gases
Example : helium,neon argon etc..
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