How many vertical columns are there in the modern periodic table and what are they called?

The modern periodic table consists of **18 vertical columns**, which are known as **groups** or **families**. Each group contains elements that share similar chemical properties and behaviors.

Understanding Groups in the Periodic Table

Here’s a brief overview of some key groups:

• Group 1: Alkali Metals
• Group 2: Alkaline Earth Metals
• Group 17: Halogens
• Group 18: Noble Gases

Characteristics of Groups

Elements within the same group often exhibit similar physical and chemical characteristics. For example, alkali metals are highly reactive, while noble gases are known for their lack of reactivity.

Importance of Groups

Understanding these groups helps in predicting how different elements will react with one another, making the periodic table a powerful tool in chemistry.