Group I elements are called as ____

N2O is a _____

The fourth period ends with the element ____

The ideal gases were in ____ group of Mendeleev’s periodic table.

The elements, Unnilhexium and Seaborgium are the same.

Which of the following is not Dobereiner triad?

What are the d-block elements called?

The p-block elements along with s-block elements are called as ____ elements.