Save
Chemistry
Paper 1
Periodic table
Save
Share
Learn
Content
Leaderboard
Learn
Created by
Esther
Visit profile
Cards (4)
Mendeleev
Arranged the elements by atomic mass
Left
gaps
for
undiscovered
elements
Modern periodic table
In order of atomic nymber
Metals on the left
Non-metals on the right
Columns
Show the groups. The group number shows the number of
electrons
in the
outer
shell.
Rows
The
periods
show the number of electron
shells
an element will have.