Question Text
Question 1 :
according to Ruther-fordis atomic model, the mass of the atom is evenly distributed throughout the atom
Question 4 :
In 1911, the physicist Ernest Rutherford discovered that atoms have a tiny, dense nucleus by shooting pisitively charged particular at a very thin gold foil. A key physical property which led Rutherford to use gold that it was
Question 7 : <p><strong>Which of them are atomic models?</strong></p><ol><li>Thomsons plum puddling model</li><li>Rutherfords nuclear model</li><li>Bohrs model</li><li>Sommerfelds model</li></ol>
Question 8 :
A proton, a deuteron and an $\alpha$-particle accelerated through the same potential difference enter a region of uniform magnetic field, moving at right angles to $B$. What is the ratio of their kinetic energies?
Question 9 :
According to the quantum theory of light, the energy of light is carried in discrete units called
Question 11 :
Which of the following is the radio isotope in this pair?$_{ 15 }^{ 30 }{ P },  _{ 15 }^{ 32 }{ P }$
Question 13 :
Isotopes of same element exists in nature.How they differ from each other ? <br/>
Question 14 :
Deuterium is the most common isotope of hydrogen. How many neutrons does it have?<br/>
Question 15 :
The two elements, with same number of electrons but different mass number, are known as
Question 16 :
Which of the following is used as standard for determination of atomic mass?
Question 20 :
Which of the following isotopes is used for treatment of cancer?
