He studied
the ‘emanation’ of thorium
and discovered a new noble
gas, an isotope of radon,
now known as thoron By
scattering alpha-rays from
the 
metal 
foils, 
he
discovered the atomic
nucleus and proposed the
plenatery model of the
atom He also estimated the
approximate size of the
nucleus ERNST RUTHERFORD (1871 – 1937)
Rationalised 2023-24
Physics
292
Fig