Question

Given below is the atomic structure of an atom of element ²⁴₁₂X, according to Bohr's model of the atom (where, n and p represent the number of neutrons and protons respectively).

If an element Y has two electrons in its outermost shell, what would be the nature and charge on the ion formed if both electrons are removed from the outermost shell?

Which of the following statements about Rutherford's model of atom are correct? (i) considered the nucleus as positively charged (ii) established that the α-particles are four times as heavy as a hydrogen atom (iii) can be compared to solar system (iv) was in agreement with Thomson's model

In the Thomson's model of atom, which of the following statments are correct? (i) the mass of the atom is assumed to be uniformaly distributed over the atom (ii) the positive charge is assumed to be uniformaly distributed over the atom (iii) the electrons are uniformaly distributed in the positively charged sphere (iv) the electrons attract each other to stabilise the atom

The first model of an atom was given by