S-block

Radioactive isotope of hydrogen is

Most abundant isotope of hydrogen is

s-Block elements are placed in

Which among the following elements of group 2 exhibits anomalous properties?

Identify the alkali metal having the smallest atomic size from following.

The most abundant element in the universe is

What is the general formula of halide salts of alkali metals if M is a metal atom ?

Which of the following ions has the largest ionic radius?

Which one of the following compounds is used as a chemical in certain types of fire extinguishers?

Which of the following factors is responsible for resemblance of hydrogen with halogens?

Which of the following ions are responsible for hardness of water?

Which of the following elements has highest electronegativity?

Which of the following elements has highest electronegativity?

Which of the following element in +1 oxidation state has largest ionic radius?

The alkali metal used in photoelectric cells is