Question 3 Page 49 (Top) - Chapter 4 Class 9 - Structure of Atom

Draw a sketch of Bohr’s model of an atom with three shells.

Answer

•  First, draw the nucleus at the centre.
• Then make three circles around that to depict the three shells
• Mark the nucleus with ‘+’ charge
• Label the shells 1, 2 and 3 as K, L and M respectively (from inner to outer shell).
• Then fill in the electrons in accordance with the rule as 2 in the 1st shell, 8 in the 2nd and 3rd shell.