lesson one (part 1)

lesson one (part 2)

lesson one ( part 3)

lesson two ( compare between metals and nonmetals)

lesson two ( mendeleev and moseley)

lesson two ( modern periodic table )

lesson two ( location )

lesson two ( block )

lesson two ( valency )

lesson three ( element )

lesson three ( compound)

lesson three ( mixture)

lesson three ( physical and chemical properties )

lesson three ( uses of some elements )

lesson four ( chemical bonds )

unit two (static electricity 1 )

unit two ( static electricity 2)

unit two ( magnet )