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

1. Central Nucleus:
– Draw a small, central circle to represent the nucleus of the atom. Label it as the nucleus.

2. First Shell (K shell):
– Around the nucleus, draw a larger circle. This represents the first electron shell or the K shell.
– Place the electrons in this shell. For simplicity, you might represent two electrons in this shell as it can hold a maximum of two electrons in the first shell.

3. Second Shell (L shell):
– Draw a larger circle around the first shell to represent the second electron shell or the L shell.
– Place electrons in this shell. The L shell can hold up to a maximum of eight electrons.

4. Third Shell (M shell):
– Draw an even larger circle around the second shell to depict the third electron shell or the M shell.
– Place electrons in this shell. The M shell can hold a maximum of 18 electrons.

5. Labeling:
– Label the shells as K, L, and M shells accordingly.
– Indicate the number of electrons in each shell, respecting the electron capacity of each shell (2, 8, and 18 electrons for K, L, and M shells, respectively).

Remember, Bohr’s model of the atom depicted electrons in fixed, discrete orbits or shells around the nucleus, each shell having a maximum capacity for electrons before the next shell is occupied. This model helped explain certain properties of atoms and their emission of spectral lines.