Q.27:- Use the periodic table to answer the following questions.
(a) Identify an element with five electrons in the outer subshell.
(b) Identify an element that would tend to lose two electrons.
(c) Identify an element that would tend to gain two electrons.
(d) Identify the group having metal, non-metal, liquid as well as gas at the room temperature.
(a) Element belonging to nitrogen family (group 15) e.g., nitrogen.
(b) Element belonging to alkaline earth family (group 2) e.g., magnesium.
(c) Element belonging to oxygen family (group 16) e.g., oxygen.
(d) Group 17 has metal, non–metal, liquid as well as gas at room temperature,i.e chlorine ,bromine are non metals while iodine is a metal. Fluorides are liquids in state while chlorine, bromine & iodine are gases .