Question

What is the total number of elements in group 17 that are gases at room temperature and standard pressure?

Answer 1

Fluorine and chlorine so only 2

Answer 2

Answer: There are 2 elements in group 17 (fluorine and chlorine) that are gases at room temperature and standard pressure.

Explanation:

Group 17 elements are known as halogens. The general electronic configuration for the elements in this group is $ns^2np^5$, where n = highest principle quantum number.

The elements belonging to this group are:

• Fluorine (F): It exist as a gas at room temperature and standard pressure
• Chlorine (Cl): It exist as a gas at room temperature and standard pressure
• Bromine (Br): It exist as a liquid at room temperature and standard pressure
• Iodine (I): It exist as a solid at room temperature and standard pressure
• Astatine (At): It exist as a solid at room temperature and standard pressure

Hence, there are 2 elements in group 17 (fluorine and chlorine) that are gases at room temperature and standard pressure.