the three elements in trads are
placed in increasing order of atomic
mass. The Middle element atomic
mass is roughly average of first and
last elkement's atomic mass
NewLands Law
The elements are placed in
increasing order of atomic
mass. the every Eighth
element have a similar
porperty as first element
Mendeleevs Laws
The properties of element
is periodic functions of
there Atomic Mass
Modren Law
The properties of element is
periodic functions of there
Atomic number
Groupnumber
In periodic law there are 18 verticle
columns known as group
periods
In periodic law there are 7 horizontal rows know as
'Periods"
Atomic Size
The term atomic size refers to the radius of an
atom. The atomic size may be visualised as the
distance between the certer of the nuclues and the
outtermost shell of an isolated atom
ionization
It is minimum energy require to
remove the outtermost electrons
is called Ionization Energy