Greek word “ATOM” is derived from?
(a) Atomo
(b) Atomoes
(c) Atomos
(d) All of them
Smaller indivisible particle was called atom by?
(a) Democritus
(b) Dalton
(c) Berzelius
(d) None of them
Sub-atomic particles are?
(a) Hypron
(b) Neutrino
(c) Antineutrino
(d) All of them
How may particle are thought to exist in an atom?
(a) 80
(b) 90
(c) 100
(d) More than 100
Fundamental particles of atom are?
(a) Electron, proton, neutron
(b) Electron,proton,hypron
(c) Electron, proton, neutrino
(d) All of them
Which scientist determined atomic masses of elements?
(a) Democritus
(b) Dalton
(c) Berzelius
(d) None of them
Which scientist determined symbols of elements?
(a) Democritus
(b) Dalton
(c) Berzelius
(d)None of them
An ordinary optical microscope can measure above?
(a) 300 nm
(b) 400 m
(c) 500 nm
(d) 600 nm
1nm=?
(1) 10^-7m
(b) 10^-8m
(c) 10^-9m
(d)10^-10m
Wavelength of electron is than visible light?
(a) Shorter
(b) Greater
(c) Neither shorter nor greater
(d) None of them
Electron microscope photogrnplh of piece of graplhiteis nagnifted about
millions times?
(a) 10
(b) 15
(c) 20
(d) 25
Diameter of atom is?
(a) 2×10^-7m
(b) 2×10^-8m
(c) 2×10^-9m
(d) 2×10^-10m
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