They have the same physical properties
They have same chemical properties
They have different No. of protons
They have the same No. Of neutrons

Neil Bohr

Einstein

Compton

Rutherford

45_{o
180^o
0^o
90^o}

Minority charge carriers

Majority charge carriers

Electrons

Protons

1831

1911

1921

1876

Small

Infinity

Zero

Large

Motional emf

Rotational emf

Induced emf

All of above

Ampere’s Law

Faraday’s Law

lenz’s Law

Newton’s Law

Length

Area

Density

Temperature

Coulomb

Newton

Faraday

Millikan