Question

Though Helium has only two electrons in its outer shell it is arranged in zero group. How do you justify ?​

Answer 1

Answer:

In the modern periodic table elements are not only arranged in according to their electronic configurations but also aacording to their similiar properties . The reason of keeping helium in group 18 is that it shows properties similar to noble gases.

Answer 2

Explanation:

In the modern periodic table elements are not only arranged in according to their electronic configurations but also aacording to their similiar properties . The reason of keeping helium in group 18 is that it shows properties similar to noble gases.