Question Text
Question 4 :
State whether the given statement is true or false:<br/>Nucleons are particles present in the nucleus of an atom.
Question 6 :
Proton is formed by the loss of electron from which atom/ion?
Question 7 :
The mass of proton is_____  times the mass of an electron.
Question 12 :
___________ said that cathode rays consist of negatively charged particles and these were named as electrons.
Question 16 :
In which of the following transformations, the $$\beta $$-particles are emitted?
Question 18 :
An atom of silicon has a mass number of $$29$$. How many neutrons does it have?  
Question 19 :
During the transformation of $$_{ c }^{ a }{ X }$$ to $$_{ d }^{ b }{ Y }$$, the number of $$\beta $$-particles emitted are
Question 20 :
The cathode rays tube experiments carried out by J.J. Thomson demonstrated that :