1. Draw a circle to represent the hydrogen atom.

2. Draw a plus (+) sign inside the circle to indicate that it is a positively charged ion.

3. Draw a line to connect the hydrogen atom to the oxygen atom.

4. Draw another line to connect the oxygen atom to the hydroxide ion.

5. Label the hydrogen atom as "H", the oxygen atom as "O", and the hydroxide ion as "OH".

To draw a particle diagram of alkali:

1. Draw a circle to represent the sodium atom.

2. Draw a minus (-) sign inside the circle to indicate that it is a negatively charged ion.

3. Draw a line to connect the sodium atom to the oxygen atom.

4. Draw another line to connect the oxygen atom to the hydroxide ion.

5. Label the sodium atom as "Na", the oxygen atom as "O", and the hydroxide ion as "OH".

Here is an example of a particle diagram of acid and alkali:

[Image of a particle diagram of acid and alkali]

In this diagram, the acid is on the left and the alkali is on the right. The arrows show the direction in which the ions are moving. The acid is dissociating into hydrogen ions (H+) and hydroxide ions (OH-), while the alkali is dissociating into sodium ions (Na+) and hydroxide ions (OH-).