2. SIR HUMPHRY DAVY
#Using electricity, he isolated many
elements
#potassium, sodium, calcium,
magnesium, stromsium, barium and
boron are isolated by him
#Conducted experiment with
passage of electriciy through
liquids
# found presence of electric charge
in substance
3. MICHAEL FARADAY
# Father of electricity
# found that electricity can pass
through liquids
# found that liquid substances can
be separated into compounds by
passing electric current through it
( Electrolysis)
# Proposed law of electrolysis.
4. J. J. THOMSON
# Discovered electron
# Proved that rays originating from
cathode are made up of negatively
charged particle.
# These particles posses mass
and energy
# These negatively charged
particle are common to all
substances irrespective of nature
of gas
# Electrons are much smaller
particles than atom and are part of
atoms
7. Review Questions
1.Who discovered electron?
2.What are the findings of Humphry Davy ?
3.Which is the important law of faraday ?
Enrichment Activity
Prepare a ppt on the doscovery of electron by
J.J Thomson
