To which group of the periodic table does cabron belong

Name a metal which can melt even in your hand. To which group of the periodic table does it belong?

A non-metal A is an important consituent of our food and forms two oxides B and C. Oxide B is toxic where as C causes global warming. To which group of Periodic table does A belong?

A non-metal A which is the largest consituent of air, when heated with H_2 in 1:3 ratio in the presence of catalyst gives a gas B. on heating with O_2 it gives an oxide C. If this oxide is passed into water in the presence of air it gives an acid D which acts as a strong oxidising agent. To which group of periodic table does this non-metal belong?

Write down the electronic configuration of elements with atomic numbers 2,14,17,19 indicate the group of the periodic tabe to which they belong?

Justify the placement of O, S, Se, Te and Po in the same group of the periodic table in terms of electronic configuration, oxidation state and hydride formation.

An element belongs to 3rd period and 17th group of periodic table.Find its electronic congiguration and valance electrons?

Nitrogen(atomic number 7 ) and phosphorus (atomic number 15) belong to group 15 of the periodic table. Write the electronic configurationos these two elements.Which of these will more electronegative? Why?