What are the roots of 1, 1, and 9 respectively as per the IUPAC nomenclature, and find out its symbol?

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

The Lanthanoid series is the same as the Actinoid series.

Eka Aluminium is _____

Metals consist of __% of the elements known.

Group I elements are called as ____

ns1 and ns2 are the outer shell configurations of elements in s-block.

What’s the name of the 109th element as per the nomenclature?