periodic table Flashcards
what are the key differences between Mendeleev and periodic table
-Mendeleev
gaps
no Nobel gases
arranged by mass number
no transition metals
-Modern
no gaps
has Nobel gases
arranged by atomic number
has transition metals
where will you find a group on the periodic table as well as period
group is a vertical column
period is a horizontal row
where do you find metals
to the left of the staircase
where do you fine non metals
to the right of the staircase
what group is the alkali metals
group one the alkali metals
what is group 7
the halogens are a group of reaction non metals they are toxic
what is in group 0
the Nobel gases nonreactive group of non metals
what are the transition metals
they have higher melting points
they have higher density
they are less reactive with water
