Which of the following is superoxide?

______ has both the characteristics of Alkali metals and halogens.

What happens to the non-metallic nature as we move from left to right in groups?

The period’s number corresponds to the highest _____

In olden days, as a privilege to the discoverer, the elements were named as they suggested by IUPAC.

Write the correct electronic configuration of Neon.

Which of the following is not a Metalloid?

The periodic functions of the ______ are the properties of respective elements.