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 in Fig. 4.2 do not represent Bohr's model of an atom correctly?

Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order (i) Rutherford's atomic model (ii) Thomson's atomic model (iii) Bohr's atomic model

Match the names of the Scientists given in column A with their contributions towards the understanding of the atomic structure as given in column B (A) (B) (a) Ernest Rutherford (i) Indivisibility of atoms (b) J.J.Thomson (ii) Stationary orbits (c) Dalton (iii) Concept of nucleus (d) Neils Bohr (iv) Discovery of electrons (e) James Chadwick (v) Atomic number (f) E. Goldstein (vi) Neutron (g) Mosley (vii) Canal rays