How do you draw the lewis dot diagram for beryllium?

In your nucleus you should include the number of protons and neutrons. The number of protons can be found in the Periodic Table as the atomic number. To get the number of neutrons, subtract the protons from the Atomic Mass.

Next, you draw the orbitals, and their respective electrons. Remember the number of electrons in each orbital.

1st orbital-2 electrons

2nd orbital- 8 electrons

3rd orbital- 18 electrons