Name three constituents of an atom and state the kind of charge on each of them.
An element has an atomic number of 13 and an atomic mass of 27. (a) How many electrons are there in each atom of the element? (b) How are these electrons distributed in the various energy levels?
(a) How many electrons are there in each atom of the element ?
(b) How are these electrons distributed in the various energy levels ?
In Thomson’s model of an atom, which of the following statements are correct?
(i) The mass of the atom is assumed to be uniformly distributed over the atom.
(ii) The positive charge is assumed to be uniformly distributed over the atom.
(iii) The electrons are uniformly distributed in the positively charged sphere.
(iv) The electrons attract each other to stabilize the atom.