The p-Block Ele...

Which one of these group off elements is also called the halogen family?

Which element is monoatomic gas at room temperature?

Among these ores the highest phosphorus content is in :

Which is the most thermodynamically stable allotropic form of phosphorus?

Essential constituents of plants and animal tissues are :

The most abundant element in the atmosphere is :

Which of the following non-metals belongs to the halogen family?

Which of the following is a noble gas?

Phosphorus normally exhibits a covalency of :

An element X combines with hydrogen to form a compound $$NH_3$$. The element X is placed on the right side of the periodic table. What is true about the element X?
(a) Has $$3$$ valence electrons
(b) Is a metal and is solid
(c) Is a non-metal and is a gas
(d) Has $$5$$ valence electrons
(e) $$NH_3$$ reacts with water to form a basic compound.