Periodic Table Flashcards
p16
1
Q
what did Mendeleev do and how did he arrange the periodic table ?
A
He proposed the periodic table and arranged the elements according to the atomic weight
2
Q
what did Moseley do and how did he arrange the periodic table ?
A
he revised it and arranged the elements by their atomic number
3
Q
chalcogens
A
group 6
apart from O, S & Se, remainder group is metallic & toxic
