CHEM BRAIN

When beryllium is bombarded with alpha -particles, extremely penetrating radiations which cannot be deflected by electrical or magnetic field are given out. These are [CPMT 1983]

Number of electrons in ₃₁⁷¹Ga⁺³ will be MDCAT2017

The increasing order for the values of e/m (charge / mass) for IIT-1984

If W is atomic weight and N is the atomic number of an element, then CPMT-1971 , 80, 89 

The nucleus of the element having atomic number 25 and atomic weight 55 will contain CPMT-1986

The number of electron in an atom of an element is equal to its  BHU-1979 

A neutral atom (atomic number > 1) consist of  CPMT-1982

Beam of charged particles are deflected by an electric field. In identical condition the angle of deflection of a particle is proportional to its charge/mass ratio.

In an experiment, protons are deflected by by an angle of 15 degree. in another experiment under identical conditions particle Y is deflected by an angle of -5 degree. What could be the composition of particle Y?  Cambridge International AS & A level-2022

Number of neutrons in ₃₀Zn⁶⁶ will be MDCAT2016

Isotopic symbol of ion of sulfur-33 is ₁₆³³S^-2 . How many number of proton and neutrons are present if number of electrons are 18. MDCAT2017

Among the following which contains same number of electrons and protons but different number of neutrons MDCAT2017

Which of the following has lowest e/m value MDCAT-2020