How many groups are present in the long form of the periodic table?

Explanation

To determine how many groups are present in the long form of the periodic table, we can follow these steps:

### Step 1: Understand the Structure of the Periodic Table
The periodic table is organized into vertical columns called groups and horizontal rows called periods.

### Step 2: Identify the Number of Groups
In the long form of the periodic table, which is also known as the modern periodic table, there are a total of 18 vertical columns or groups.

...