State (a) the mass (b) charge on :
neutron

State (a) the mass (b) charge on : electron

State (a) the mass (b) charge on : proton

What is the fraction of the mass of water due to neutrons?

m_(P) and m_(n) are masses of proton and neutron respectively. An element of mass m has Z protons and N neutrons, then

(a) What is a.m.u ? Express 1 a.m.u. in MeV. (b) Write the approximate mass of a proton, neutron and electron in a.m.u.

Sulphur has an atomic number 16 and a mass number of 32. State the number of protons and neutrons in the nucleus of sulphur. Give a simple diagram to show the arrangement of electrons in an atom of sulphur.

A hypothetical ion of element X with mass number 40, posses 2 units of positive charge and 23% more neutrons than electrons. Symbol of the ion is :

Name the three constituents of an atom and state mass and charge of each. How are they distributed in an atom ?

Atom consist of electrons , protons and neutrons . If the mass attributed to neutron were halved and that attributed to the electrons were doubled , the atomic mass of 6C^(12) would be approximately :

Be^(3+) and a proton are accelerated by the same potential, their de - Broglie wavelengths have the ratio ( assume mass of proton = mass of neutron ) :