In which group are the non-metal elements placed in a vertical column on the right side of the periodic table ?

Group 17 

The correct answer is option 3. Group 17.

In the periodic table, elements are arranged into groups (vertical columns) and periods (horizontal rows) based on their chemical properties. Group 17 is often referred to as the "halogens" group, and it consists of non-metal elements.

Here are the elements in Group 17 (also known as Group VIIA):

1. Fluorine (F)
2. Chlorine (Cl)
3. Bromine (Br)
4. Iodine (I)
5. Astatine (At)

These elements are characterized by having high electronegativity and a tendency to gain electrons to achieve a stable electron configuration. Halogens are reactive non-metals, and they exhibit similar chemical behavior due to their similar electronic structure. They often form salts when they react with metals.

The vertical arrangement in a group signifies that elements within the same group share similar chemical properties and valence electron configurations. In the case of Group 17, all the elements have seven electrons in their outermost electron shell, contributing to their similar chemical behavior.