[طُهرَ]

هذآ موزلي

http://www.rsc.org/Education/Teachers/Resources/periodictable/scientists/moseley.jpg


هذآ الثاني دوبرآينر

http://www.schoolarabia.net/images/modules/chemistry/general_chemistry_im/level5/drasat/dobereiner.jpg

هذآ الأخخير

http://upload.wikimedia.org/wikipedia/commons/thumb/9/90/John_Alexander_Reina_Newlands.jpg/220px-John_Alexander_Reina_Newlands.jpg

وشككراً