Chemical Period...

Which of these dose not reflect the periodicity of the elements

The electronic configuration of halogen is

Hydrogen by donating one electron forms H⁺. In this property, it resembles with

The tenth elements in the periodic table resembles with the

Who developed the long form of periodic table

The electronic configuration of an element is 1s², 2s²2p⁶, 3s²3p³. What is the atomic number of the element which is just below the above element in the periodic table

In the periodic table, the element with atomic number 16 will be placed in the group

The d-block elements consists mostly of

Which one of the following belongs to representative group of elements in the periodic table

An element of atomic number 29 belongs to